EP1055635B1 - Crane with a telescopic boom - Google Patents

Crane with a telescopic boom Download PDF

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Publication number
EP1055635B1
EP1055635B1 EP00250048A EP00250048A EP1055635B1 EP 1055635 B1 EP1055635 B1 EP 1055635B1 EP 00250048 A EP00250048 A EP 00250048A EP 00250048 A EP00250048 A EP 00250048A EP 1055635 B1 EP1055635 B1 EP 1055635B1
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EP
European Patent Office
Prior art keywords
coupling
locking
crane according
displacement device
locking bolt
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
EP00250048A
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German (de)
French (fr)
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EP1055635A3 (en
EP1055635A2 (en
Inventor
Frank Conrad
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Terex Demag GmbH and Co KG
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Terex Demag GmbH and Co KG
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Filing date
Publication date
Priority claimed from DE10007773A external-priority patent/DE10007773B4/en
Application filed by Terex Demag GmbH and Co KG filed Critical Terex Demag GmbH and Co KG
Publication of EP1055635A2 publication Critical patent/EP1055635A2/en
Publication of EP1055635A3 publication Critical patent/EP1055635A3/en
Application granted granted Critical
Publication of EP1055635B1 publication Critical patent/EP1055635B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes 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
    • B66C23/62Constructional features or details
    • B66C23/64Jibs
    • B66C23/70Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/708Jibs 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 crane with a telescopic boom according to the preamble of claim 1.
  • a crane with a telescopic boom is known from DE 198 24 672 A1.
  • This consists of a basic box and arranged therein, individual telescopic shots, which after loosening of arresting Bolt connections by coupling with only one single-stage hydraulic piston-cylinder unit retractable and retractable and in the extended or retracted position are lockable, wherein the cylinder housing of the piston-cylinder unit with his rear end is attached to the inner end of the basic boom and the Piston rod at the front end with a parallel to the piston-cylinder unit lying guiding and pulling device is connected, at the inner end of a Coupling and locking unit is attached, which with recordings of telescopic shots can be coupled and locked.
  • the coupling and Locking unit has two mechanically via a grooves exhibiting Slider actuatable coupling pins on which in a horizontal plane lying right and left in arranged at the inner end of each shot Recordings can be moved in and out.
  • the actuation of the sliding piece takes place via an axially connected to the coupling and locking unit Piston-cylinder unit, wherein the means for retracting the spring-loaded Locking bolt can only be operated when the clutch and Locking unit with the recordings of the out-of-pocket or telescoping Schusses is coupled and releasing the coupling pin with the respective shot can only take place when the respective spring-loaded locking bolt is set.
  • A1 crane with telescopic boom are the single telescopic shots after releasing arresting Bolt connections with only one single-stage piston-cylinder unit off and retractable and in each off or retracted positions by in the direction of her locked positions bolted spring-loaded locking bolts.
  • the Piston rod of the single-stage piston-cylinder unit is at the inner end of the articulated outer shot complete boom linkage.
  • a Carrier device which can be coupled with recordings of austeleskopierbaren shots is located in the region of the end of the cylinder from which the piston rod exit.
  • the entrainment device consists of a hydraulic block with each other opposite cylinders for the one and the piston formed by the piston extendable the respective shot arresting bolt and a perpendicular thereto arranged hydraulic piston-cylinder unit for actuating the respective Locking bolt.
  • the hydraulic elements of the driver stand so operatively connected that the radially located piston-cylinder unit for retraction of the respective locking bolt can only be operated when the Carrier device with the off or detailedteleskopierenden shot over the locking pin is coupled.
  • a telescopic boom known from DE 196 41 191 A1
  • the shots to be telescoped by means of two Endless ropes, each with one extension and retraction side in conjunction with a cable drive and pulleys extendable and retractable.
  • the Shots In the extended and retracted position are the Shots by means of a locking device associated with each shot against Relative axial movement detected.
  • the rope drive and two pulleys are on Base of the base box and a third pulley is on the rope drive opposite end of a cantilevered within the shots and am Base box rigidly mounted guide tube arranged.
  • the benchmarks of Rope ends are located on a holding device with a gripping device provided slidably mounted on the guide tube.
  • the object of the invention is to provide a crane with a telescopic boom so to further develop that by simplifying the coupling and Locking unit space and weight can be saved.
  • the coupling part with a coaxial movable locking bolt of a locking element form-fitting is detachable.
  • the special feature of this arrangement is that in unlocked position the locking bolt in combination with the coupling part between the coupling Displacement device and the respective in and out bagschuß shot represents. In the transition phase between unlocking and locking comes each a projecting portion of the coupling part and the locking bolt form fit to the plant and thus forms the safeguard against falling in of the Telescopic.
  • the advantage of the proposed arrangement is the fact that fewer parts needed so that weight is saved without the required Safety concept to affect the secure bolting of the shots. Also at the new arrangement ensures that the respective shot either locks or coupled. Another advantage is the space savings, as in the usual Separately arranged elements more space was needed, resulting in the smallest Telescoping shot can cause problems.
  • the displacement device for moving the shots can be a rope drive, a one or Multi-stage piston-cylinder unit or several piston-cylinder units to be operated in parallel be.
  • the positive connection of the coupling part takes place with the Locking bolt on a mushroom-shaped at the inner end of the locking bolt arranged coupling piece, which is arranged in a coupling part in the recess intervenes.
  • the Locking bolt On a mushroom-shaped at the inner end of the locking bolt arranged coupling piece, which is arranged in a coupling part in the recess intervenes.
  • only one Provide locking element which in each prosecutteleskopierenden shot is arranged centrally above or below the center.
  • the accompanying recording of the to telescoping shot comprehensive shot is located in the top wall or in the lower wall.
  • the axis of these two Locking elements or their cooperating coupling elements cut the Center axis of the displacement device at right angles.
  • the two locking elements in the two opposite Sidewall areas arranged. But it is also conceivable an arrangement in which the two locking elements are arranged in the top and bottom wall.
  • Figure 1 shows in cross section and Figure 2 in a view the right half of a part Telescopic boom in the area of the rear storage. Shown here are only two Telescope shots 1, 2 to illustrate the principle. Applicable is the novel Coupling and locking system also for telescopic boom with more than two telescopic telescopic shots.
  • sliding elements 3, 4 preferably made of polyamide attached.
  • In one Frame 5 is in a side wall 5.1 and in the associated telescopic section. 2 a locking element 6 is arranged.
  • a locking pin 24 of the Locking element 6 is displaceable with an axially Coupling part 15 of a coupling element 7 can be coupled. The details are explained in the following figures.
  • the coupling element 7 is at a displaceable element 8 of a displacement device, not shown attached.
  • the Longitudinal movement of the displaceable element 8 of the displacement device is in Figure 2 identified by a double arrow 10. This means the top going arrow the direction for the telescope and the down arrow the direction for the telescoping.
  • the mechanical connection of the hydraulic Piston-cylinder unit 9 with the coupling part 15 takes place via a lever 11, which with its upper end to the hydraulic piston-cylinder unit 9 and with his lower end is hinged to a fixed rod 12 and a bolt 13 with the coupling part 15 is connected.
  • the state shown in Figures 1 and 2 shows the Locking position between the telescopic section 2 with him comprehensive Telescopic shot 1 and the possibility by means of the displaceable element 8 of Displacement device the associated coupling element 7 according to the Double Arrow 10 to position.
  • Figures 3 - 6 show views of both the coupling element 7 and the Locking element 6.
  • the coupling element 7 has a sleeve 14, which is firmly connected to the displaceable element 8 of the displacement device.
  • a coupling part 15 is arranged, which by means of the bolt 13 and the Lever 11 is axially movable.
  • the lever 11 For the movement of the lever 11 are in the sleeve 14th axially extending recesses 16, 17 milled (see Fig. 1).
  • the coupling part 15 has a crescent-shaped recess 18. Furthermore, the coupling part 15 has a transverse recess 19, which makes it possible to connect the coupling part 15 with the locking pin 24 in a form-fitting manner. The manner in which this is done is explained in more detail in FIGS. 7-9.
  • the locking element 6 is corresponding to the illustrations in Figure 2 and Figure 5 and 6 composed of the following elements.
  • a sleeve 20 is attached, which is the has the same outer and inner diameter as the sleeve 14 for the Coupling element 7.
  • a sliding bush 21 for Facilitation of the axial sliding of the locking bolt 24.
  • a transverse web 29 is arranged, for example, via welding in the sleeve 20 is attached.
  • This crosspiece 29 forms with the sleeve 20 two each other opposite crescent-shaped openings, through which the also sickle-shaped formed webs 22, 23 of the locking bolt 24 are movable ( Figure 5).
  • a central recess 30 of the locking bolt 24 is a spring 25th arranged on the one hand on the front side of the recess of the Locking bolt 24 and on the other hand supported on the transverse web 29.
  • a screw 26 By the Locking pin 24 and through the transverse web 29 extends in the axial center position a screw 26, on the end of the thread a mushroom-shaped Coupling piece 27 is screwed.
  • the sliding bush is secured axially by a Ring with several circumferentially arranged fastening screws 28 (Fig.2).
  • FIGS 7a, b to 9a - c are the essential phases for unlocking with the proposed device shown.
  • FIGs 7a, 8a and 9a another unspecified Telescopic shot shown. This includes the two marked 1 and 2 Telescoping sections.
  • FIG. 7b shows the longitudinal section of FIG. 7a. Comparable as in Figures 1 and 2, Figures 7a, 7b show a state in which the Telescopic section 2 is locked with the telescopic section 1 comprising it.
  • FIGS. 8a-8c show a further phase of the unlocking process.
  • the coupling element 7.1 has been moved so far until the coupling part 15.1 by means of the piston-cylinder unit 9 and the lever 11.1 can be moved to the left. This shift is required for the transverse recess 19.1 in the coupling part 15.1 in height of the coupling piece 27.1 of the locking element 6.1 is located.
  • By moving the coupling element 7.1 towards Austeleskopieren comes the coupling piece 27.1 in a form-fitting manner Engagement with the recess 19.1 (part 8c).
  • Austeleskopieren comes from the lying end face of the recess 19.1 supporting portion of the coupling part 15.1 on the inside of the web 23.1 of Locking bolt 24.1 to the plant.
  • displaceable element 8 of the displacement device forth force on the Locking element 6.1 are exercised. This allows the head area of the Locking bolt 24.1 from the edge region of the ring-like insert 32.1 move away, as part 8c shows. Only in this position can the Locking bolt 24.1 are pulled.
  • FIGS. 9a-9c show the last phase of the unlocking process.
  • the hydraulic piston-cylinder unit 9 activated and against the force of the spring 25.1 the coupling part 15.1 moved by the lever 11.1 to the right. Due to the positive connection simultaneously moves the locking pin 24.1 from the recess 31.1 of bordering telescopic shot 1 out and thus are the two telescopic shots 1, 2 unlocked, wherein in the right half of the part, not shown here Locking bolt 24 in the same manner by means of the coupling part 15th has been drawn.

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

Abstract

The jib consists of telescopic elements (1,2), moved by a sliding device with sliding element (8). The element supports a coupling element (7) with a coupling part, which is moveable in radial direction. The part is locked positive with a locking bol (24) of a locking element (6). In unlocked position, locking bolt and coupling part form a coupling between the sliding element a telescopic jib element concerned. In the transitional phase between locking and unlocking, front parts of sliding element and locking bolt engage positively.

Description

Die Erfindung betrifft einen Kran mit einem Teleskopausleger gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a crane with a telescopic boom according to the preamble of claim 1.

Ein Kran mit einem Teleskopausleger ist aus der DE 198 24 672 A1 bekannt. Dieser besteht aus einem Grundkasten und darin angeordneten, einzelnen austeleskopierbaren Schüssen, die nach dem Lösen von arretierenden Bolzenverbindungen durch Kupplung mit nur einer einstufigen hydraulischen Kolben-Zylindereinheit aus- und einfahrbar und in der aus- oder eingefahrenen Stellung verriegelbar sind, wobei das Zylindergehäuse der Kolben-Zylindereinheit mit seinem hinteren Ende am inneren Ende des Grundauslegers befestigt ist und die Kolbenstange am vorderen Ende mit einer parallel zur Kolben-Zylindereinheit liegenden Führungs- und Zugvorrichtung verbunden ist, an deren innerem Ende eine Kupplungs- und Verriegelungseinheit befestigt ist, die mit Aufnahmen der austeleskopierbaren Schüsse kuppel- und verriegelbar ist. Die Kupplungs- und Verriegelungseinheit weist zwei mechanisch über ein Nuten aufweisendes Schiebestück betätigbare Kupplungsbolzen auf, die in einer horizontalen Ebene liegend rechts und links in am inneren Ende des jeweiligen Schusses angeordnete Aufnahmen ein- und ausschiebbar sind. Die Betätigung des Schiebestückes erfolgt über eine mit der Kupplungs- und Verriegelungseinheit verbundene axial angeordnete Kolben-Zylindereinheit, wobei das Mittel zum Einziehen des federbelasteten Verriegelungsbolzens nur betätigt werden kann, wenn die Kupplungs- und Verriegelungseinheit mit den Aufnahmen des aus- oder einzuteleskopierenden Schusses gekuppelt ist und das Lösen der Kupplungsbolzen mit dem jeweiligen Schuß nur erfolgen kann, wenn der jeweilige federbelastete Verriegelungsbolzen gesetzt ist.A crane with a telescopic boom is known from DE 198 24 672 A1. This consists of a basic box and arranged therein, individual telescopic shots, which after loosening of arresting Bolt connections by coupling with only one single-stage hydraulic piston-cylinder unit retractable and retractable and in the extended or retracted position are lockable, wherein the cylinder housing of the piston-cylinder unit with his rear end is attached to the inner end of the basic boom and the Piston rod at the front end with a parallel to the piston-cylinder unit lying guiding and pulling device is connected, at the inner end of a Coupling and locking unit is attached, which with recordings of telescopic shots can be coupled and locked. The coupling and Locking unit has two mechanically via a grooves exhibiting Slider actuatable coupling pins on which in a horizontal plane lying right and left in arranged at the inner end of each shot Recordings can be moved in and out. The actuation of the sliding piece takes place via an axially connected to the coupling and locking unit Piston-cylinder unit, wherein the means for retracting the spring-loaded Locking bolt can only be operated when the clutch and Locking unit with the recordings of the out-of-pocket or telescoping Schusses is coupled and releasing the coupling pin with the respective shot can only take place when the respective spring-loaded locking bolt is set.

Bei einem aus der EP 0 661 234 A1 bekannten Kran mit Teleskopausleger sind dessen einzelne austeleskopierbare Schüsse nach dem Lösen von arretierenden Bolzenverbindungen mit nur einer einstufigen Kolben-Zylindereinheit aus- und einfahrbar und in den jeweils aus- oder eingefahrenen Stellungen durch in Richtung auf ihr verriegelten Stellungen federbelastete Verriegelungsbolzen verbolzt. Die Kolbenstange der einstufigen Kolben-Zylindereinheit ist an dem das innere Ende des äußeren Schusses abschließenen Auslegeranlenkstück angelenkt. Eine Mitnehmereinrichtung, die mit Aufnahmen der austeleskopierbaren Schüsse kuppelbar ist, ist in dem Bereich des Endes des Zylinders angeordnet, aus dem die Kolbenstange austritt. Die Mitnehmereinrichtung besteht aus einem hydraulischen Block mit einander gegenüberliegenden Zylindern für die durch deren Kolben gebildeten ein- und ausfahrbaren den jeweiligen Schuß arretierenden Bolzen sowie einer senkrecht dazu angeordneten hydraulischen Kolben-Zylindereinheit zum Betätigen des jeweiligen Verriegelungsbolzens. Die hydraulischen Elemente der Mitnehmereinrichtung stehen so in Wirkverbindung, dass die radial liegende Kolben-Zylindereinheit zum Einziehen des jeweiligen Verriegelungsbolzens nur betätigt werden kann, wenn die Mitnehmereinrichtung mit dem aus- oder einzuteleskopierenden Schuß über den arretierenden Bolzen gekuppelt ist.In a known from EP 0 661 234 A1 crane with telescopic boom are the single telescopic shots after releasing arresting Bolt connections with only one single-stage piston-cylinder unit off and retractable and in each off or retracted positions by in the direction of her locked positions bolted spring-loaded locking bolts. The Piston rod of the single-stage piston-cylinder unit is at the inner end of the articulated outer shot complete boom linkage. A Carrier device which can be coupled with recordings of austeleskopierbaren shots is located in the region of the end of the cylinder from which the piston rod exit. The entrainment device consists of a hydraulic block with each other opposite cylinders for the one and the piston formed by the piston extendable the respective shot arresting bolt and a perpendicular thereto arranged hydraulic piston-cylinder unit for actuating the respective Locking bolt. The hydraulic elements of the driver stand so operatively connected that the radially located piston-cylinder unit for retraction of the respective locking bolt can only be operated when the Carrier device with the off or einzuteleskopierenden shot over the locking pin is coupled.

Bei einem aus der DE 196 41 191 A1 bekannten Teleskopausleger, insbesondere für stationäre und fahrbare Krane sind die zu teleskopierenden Schüsse, mittels zweier Endlosseile mit je einer Ausfahr- und Einfahrseite in Verbindung mit einem Seilantrieb und Umlenkrollen aus- und einfahrbar. In der ein- und ausgefahrenen Stellung sind die Schüsse mittels einer jedem Schuß zugeordneten Verriegelungsvorrichtung gegen relative Axialbewegung feststellbar. Der Seilantrieb und zwei Umlenkrollen sind am Fuß des Grundkastens und eine dritte Umlenkrolle ist an dem dem Seiltrieb abgewandten Ende eines innerhalb der Schüsse kragartig gelagerten und am Grundkasten starr befestigten Führungsrohres angeordnet. Die Festpunkte der Seilenden befinden sich an einer Halteeinrichtung, die mit einer Greifvorrichtung versehen verschiebbar auf dem Führungsrohr angeordnet ist.In a telescopic boom known from DE 196 41 191 A1, in particular for stationary and mobile cranes are the shots to be telescoped, by means of two Endless ropes, each with one extension and retraction side in conjunction with a cable drive and pulleys extendable and retractable. In the extended and retracted position are the Shots by means of a locking device associated with each shot against Relative axial movement detected. The rope drive and two pulleys are on Base of the base box and a third pulley is on the rope drive opposite end of a cantilevered within the shots and am Base box rigidly mounted guide tube arranged. The benchmarks of Rope ends are located on a holding device with a gripping device provided slidably mounted on the guide tube.

Aufgabe der Erfindung ist es, einen Kran mit einem Teleskopausleger so weiterzuentwickeln, dass durch Vereinfachung der Kupplungs- und Verriegelungseinheit Platz und Gewicht gespart werden. The object of the invention is to provide a crane with a telescopic boom so to further develop that by simplifying the coupling and Locking unit space and weight can be saved.

Diese Aufgabe wird ausgehend vom Oberbegriff in Verbindung mit den kennzeichnenden Merkmalen des Patentanspruches 1 gelöst. Vorteilhafte Weiterbildungen sind jeweils Gegenstand von Unteransprüchen.This object is based on the preamble in connection with the characterizing features of claim 1. advantageous Further developments are the subject of dependent claims.

Lösungsgemäß ist am verschiebbaren Element der die Schüsse ein- und austeleskopierenden Verschiebeeinrichtung mindestens ein senkrecht zur Achse der Verschiebeeinrichtung liegendes und in radialer Richtung bewegbares Kupplungselement vorgesehen, dessen Kupplungsteil mit einem achsgleich bewegbaren Verriegelungsbolzen eines Verriegelungselementes formschlüssig kuppelbar ist. Das Besondere an dieser Anordnung ist, dass in Entriegelungsstellung der Verriegelungsbolzen in Kombination mit dem Kupplungsteil die Kupplung zwischen Verschiebeeinrichtung und dem jeweiligen ein- und auszuteleskopierenden Schuß darstellt. In der Übergangsphase zwischen Entriegelung und Verriegelung kommt jeweils ein vorstehender Bereich des Kupplungsteiles und des Verriegelungsbolzens formschlüssig zur Anlage und bildet damit die Sicherung gegen Hineinfallen des Teleskopschusses. Bisher waren die beiden Funktionen Kupplung und Verriegelung auf zwei separat zu betätigende Elemente aufgeteilt, wobei in der Übergangsphase die beiden Funktionen miteinander verknüpft werden mußten, um sicherzustellen, dass der jeweilige Schuß in jeder Betriebsphase sicher verbolzt ist, sei es über die Kupplungsbolzen, sei es über den bzw. die Verriegelungsbolzen.According to the solution is on the movable element of the shots on and telescoping displacement device at least one perpendicular to the axis of the Slider lying and movable in the radial direction Coupling provided, the coupling part with a coaxial movable locking bolt of a locking element form-fitting is detachable. The special feature of this arrangement is that in unlocked position the locking bolt in combination with the coupling part between the coupling Displacement device and the respective in and out bagschuß shot represents. In the transition phase between unlocking and locking comes each a projecting portion of the coupling part and the locking bolt form fit to the plant and thus forms the safeguard against falling in of the Telescopic. So far, the two functions were clutch and lock divided into two separately operable elements, wherein in the transition phase Both functions had to be linked together to ensure that the each shot is securely bolted in each phase of operation, be it about the Clutch pin, whether over the locking pin or the.

Der Vorteil der vorgeschlagenen Anordnung ist darin zu sehen, dass weniger Teile benötigt werden, damit Gewicht eingespart wird, ohne das erforderliche Sicherheitskonzept der sicheren Verbolzung der Schüsse zu beeinträchtigen. Auch bei der neuen Anordnung ist sichergestellt, dass der jeweilige Schuß entweder verriegelt oder gekuppelt ist. Ein weiterer Vorteil ist die Platzersparnis, da bei den bisher üblichen getrennt angeordneten Elementen mehr Platz benötigt wurde, was bei dem kleinsten zu teleskopierenden Schuß Probleme bereiten kann.The advantage of the proposed arrangement is the fact that fewer parts needed so that weight is saved without the required Safety concept to affect the secure bolting of the shots. Also at the new arrangement ensures that the respective shot either locks or coupled. Another advantage is the space savings, as in the usual Separately arranged elements more space was needed, resulting in the smallest Telescoping shot can cause problems.

Die Verschiebeeinrichtung zum Bewegen der Schüsse kann ein Seiltrieb, eine einoder mehrstufige Kolben-Zylindereinheit oder mehrere parallel zu betreibende Kolben-Zylindereinheiten sein. The displacement device for moving the shots can be a rope drive, a one or Multi-stage piston-cylinder unit or several piston-cylinder units to be operated in parallel be.

Bei Verwendung einer Kolben-Zylindereinheit zum Bewegen der Schüsse kann entweder die Kolbenstange oder das Zylindergehäuse fest mit dem Auslegeranlenkstück des Grundkastens verbunden sein.When using a piston-cylinder unit to move the shots can either the piston rod or the cylinder housing firmly with the Be connected boom connecting piece of the ground box.

Vorzugsweise erfolgt die formschlüssige Verbindung des Kupplungsteiles mit dem Verriegelungsbolzen über ein pilzförmiges am inneren Ende des Verriegelungsbolzens angeordnetes Kupplungsstück, das in eine im Kupplungsteil angeordnete Ausnehmung eingreift. Bei sehr kleinen und leichten Teleskopauslegern ist es ausreichend, nur ein Verriegelungselement vorzusehen, das im jeweiligen auszuteleskopierenden Schuß mittig oben oder mittig unten angeordnet ist. Die dazugehörige Aufnahme des den zu teleskopierenden Schuß umfassenden Schusses befindet sich in der Oberwand bzw. in der Unterwand. Bei größeren Auslegern wird man aus Gründen des an der Verschiebeeinrichtung angreifenden Momentes eine Anordnung mit zwei einander gegenüberliegenden Verriegelungselementen vorsehen. Die Achse dieser beiden Verriegelungselemente bzw. deren mitwirkenden Kupplungselemente schneiden die Mittelachse der Verschiebeeinrichtung im rechten Winkel. Vorzugsweise sind die beiden Verriegelungselemente in den beiden einander gegenüberliegenden Seitenwandbereichen angeordnet. Vorstellbar ist aber auch eine Anordnung, bei der die beiden Verriegelungselemente in der Ober- und Unterwand angeordnet sind.Preferably, the positive connection of the coupling part takes place with the Locking bolt on a mushroom-shaped at the inner end of the locking bolt arranged coupling piece, which is arranged in a coupling part in the recess intervenes. For very small and light telescopic jibs it is sufficient, only one Provide locking element, which in each auszuteleskopierenden shot is arranged centrally above or below the center. The accompanying recording of the to telescoping shot comprehensive shot is located in the top wall or in the lower wall. For larger arms you will for reasons of on the Shifting moment attacking an arrangement with two each other Provide opposite locking elements. The axis of these two Locking elements or their cooperating coupling elements cut the Center axis of the displacement device at right angles. Preferably, the two locking elements in the two opposite Sidewall areas arranged. But it is also conceivable an arrangement in which the two locking elements are arranged in the top and bottom wall.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung von in einer Zeichnung dargestellten Ausführungsbeispielen. Es zeigen:

Figur 1
im Querschnitt die rechte Teilhälfte eines Teleskopauslegers,
Figur 2
eine Ansicht in Richtung X1 in Figur 1,
Figur 3
eine Ansicht in Richtung X2 in Figur 2,
Figur 4
eine Ansicht in Richtung X3 in Figur 2,
Figur 5
eine Ansicht in Richtung X4 in Figur 2,
Figur 6
eine Ansicht in Richtung X5 in Figur 2,
Figur 7a, b
im Quer- und Längsschnitt eine erste Phase des Kupplungs- und Entriegelungsvorganges,
Figur 8a - c
im Quer- und Längsschnitt eine zweite Phase und
Figur 9a - c
im Quer- und Längsschnitt die letzte Phase.
Further features, advantages and details of the invention will become apparent from the following description of exemplary embodiments illustrated in a drawing. Show it:
FIG. 1
in cross-section the right half of a telescopic boom,
FIG. 2
a view in the direction X 1 in Figure 1,
FIG. 3
a view in the direction X 2 in Figure 2,
FIG. 4
a view in the direction X 3 in Figure 2,
FIG. 5
a view in the direction X 4 in Figure 2,
FIG. 6
a view in the direction X 5 in Figure 2,
FIG. 7a, b
in transverse and longitudinal section, a first phase of the coupling and unlocking process,
FIG. 8a-c
in transverse and longitudinal section a second phase and
FIG. 9a-c
in transverse and longitudinal section the last phase.

Figur 1 zeigt im Querschnitt und Figur 2 in einer Ansicht die rechte Teilhälfte eines Teleskopauslegers im Bereich der hinteren Lagerung. Dargestellt sind hier nur zwei Teleskopschüsse 1, 2, um das Prinzip zu verdeutlichen. Anwendbar ist das neuartige Kupplungs- und Verriegelungssystem auch für Teleskopausleger mit mehr als zwei teleskopierbaren Teleskopschüssen. Zur Führung der Teleskopschüsse 1, 2 sind in den Eckrundungen Gleitelemente 3, 4 vorzugsweise aus Polyamid befestigt. In einem Rahmengestell 5 ist in einer Seitenwand 5.1 und im dazugehörigen Teleskopschuss 2 ein Verriegelungselement 6 angeordnet. Ein Verriegelungsbolzen 24 des Verriegelungselementes 6 ist mit einem in axialer Richtung verschiebbaren Kupplungsteil 15 eines Kupplungselementes 7 kuppelbar. Die Einzelheiten dazu werden in den nachfolgenden Figuren erläutert. Das Kupplungselement 7 ist an einem verschiebbaren Element 8 einer nicht näher dargestellten Verschiebeeinrichtung befestigt. Die Betätigung des Kupplungsteiles 15 erfolgt mittels einer quer zur Längsachse angeordneten hydraulischen Kolben-Zylindereinheit 9. Die Längsbewegung des verschiebbaren Elementes 8 der Verschiebeeinrichtung ist in Figur 2 durch einen Doppelpfeil 10 kenntlich gemacht. Dabei bedeutet der nach oben gehende Pfeil die Richtung für das Austeleskopieren und der nach unten gehende Pfeil die Richtung für das Einteleskopieren. Die mechanische Verbindung der hydraulischen Kolben-Zylindereinheit 9 mit dem Kupplungsteil 15erfolgt über einen Hebel 11, der mit seinem oberen Ende an der hydraulischen Kolben-Zylindereinheit 9 und mit seinem unteren Ende an einem festen Gestänge 12 angelenkt ist und über einen Bolzen 13 mit dem Kupplungsteil 15 verbunden ist. Der in Figur 1 und 2 dargestellte Zustand zeigt die Verriegelungsstellung zwischen dem Teleskopschuss 2 mit dem ihn umfassenden Teleskopschuss 1 und die Möglichkeit mittels des verschiebbaren Elementes 8 der Verschiebeeinrichtung das damit verbundene Kupplungselement 7 entsprechend dem Doppelpfeil 10 in Position zu bringen. Figure 1 shows in cross section and Figure 2 in a view the right half of a part Telescopic boom in the area of the rear storage. Shown here are only two Telescope shots 1, 2 to illustrate the principle. Applicable is the novel Coupling and locking system also for telescopic boom with more than two telescopic telescopic shots. To guide the telescopic sections 1, 2 are in the Eckrundungen sliding elements 3, 4 preferably made of polyamide attached. In one Frame 5 is in a side wall 5.1 and in the associated telescopic section. 2 a locking element 6 is arranged. A locking pin 24 of the Locking element 6 is displaceable with an axially Coupling part 15 of a coupling element 7 can be coupled. The details are explained in the following figures. The coupling element 7 is at a displaceable element 8 of a displacement device, not shown attached. The actuation of the coupling part 15 by means of a transverse to Longitudinal axis arranged hydraulic piston-cylinder unit 9. The Longitudinal movement of the displaceable element 8 of the displacement device is in Figure 2 identified by a double arrow 10. This means the top going arrow the direction for the telescope and the down arrow the direction for the telescoping. The mechanical connection of the hydraulic Piston-cylinder unit 9 with the coupling part 15 takes place via a lever 11, which with its upper end to the hydraulic piston-cylinder unit 9 and with his lower end is hinged to a fixed rod 12 and a bolt 13 with the coupling part 15 is connected. The state shown in Figures 1 and 2 shows the Locking position between the telescopic section 2 with him comprehensive Telescopic shot 1 and the possibility by means of the displaceable element 8 of Displacement device the associated coupling element 7 according to the Double Arrow 10 to position.

Die Figuren 3 - 6 zeigen Ansichten sowohl des Kupplungselementes 7 als auch des Verriegelungselementes 6. Danach weist das Kupplungselement 7 eine Hülse 14 auf, die fest mit dem verschiebbaren Element 8 der Verschiebeeinrichtung verbunden ist. In der Hülse 14 ist ein Kupplungsteil 15 angeordnet, das mittels des Bolzens 13 und des Hebels 11 axial bewegbar ist. Für die Bewegung des Hebels 11 sind in der Hülse 14 axial verlaufende Aussparungen 16, 17 eingefräst (siehe Fig. 1).Figures 3 - 6 show views of both the coupling element 7 and the Locking element 6. Thereafter, the coupling element 7 has a sleeve 14, which is firmly connected to the displaceable element 8 of the displacement device. In the sleeve 14, a coupling part 15 is arranged, which by means of the bolt 13 and the Lever 11 is axially movable. For the movement of the lever 11 are in the sleeve 14th axially extending recesses 16, 17 milled (see Fig. 1).

In der Ansicht X3 (Fig. 4) ist zu erkennen, dass das Kupplungsteil 15 eine sichelförmige Ausnehmung 18 aufweist. Weiterhin weist das Kupplungsteil 15 eine querliegende Ausnehmung 19 auf, die es ermöglicht, das Kupplungsteil 15 mit dem Verriegelungsbolzen 24 formschlüssig zu verbinden. Die Art und Weise, wie dies erfolgt, wird in den Figuren 7 - 9 näher erläutert.In the view X 3 (FIG. 4), it can be seen that the coupling part 15 has a crescent-shaped recess 18. Furthermore, the coupling part 15 has a transverse recess 19, which makes it possible to connect the coupling part 15 with the locking pin 24 in a form-fitting manner. The manner in which this is done is explained in more detail in FIGS. 7-9.

Das Verriegelungselement 6 ist entsprechend den Darstellungen in Figur 2 und Figur 5 und 6 aus folgenden Elementen aufgebaut. In der Seitenwand 5.1 des Rahmengestells 5 und in der Seitenwand des Teleskopschusses 2 ist eine Hülse 20 befestigt, die den gleichen Außen- und Innenduchmesser aufweist wie die Hülse 14 für das Kupplungselement 7. In die Hülse 20 eingesetzt ist eine Gleitbuchse 21 zur Erleichterung des axialen Gleitens des Verriegelungsbolzens 24. Im Bodenbereich der Gleitbuchse 21 ist ein Quersteg 29 angeordnet, der beispielsweise über Schweißen in der Hülse 20 befestigt ist. Dieser Quersteg 29 bildet mit der Hülse 20 zwei einander gegenüberliegende sichelförmige Öffnungen, durch die die ebenfalls sichelförmig ausgebildeten Stege 22, 23 des Verriegelungsbolzens 24 bewegbar sind (Fig.5). In einer mittigen Ausnehmung 30 des Verriegelungsbolzens 24 ist eine Feder 25 angeordnet, die sich einerseits auf der Stirnseite der Ausnehmung des Verriegelungsbolzens 24 und andererseits auf dem Quersteg 29 abstützt. Durch den Verriegelungsbolzen 24 und durch den Quersteg 29 erstreckt sich in axialer Mittellage eine Schraube 26, auf die im Endbereich des Gewindes ein pilzförmig ausgebildetes Kupplungsstück 27 aufgeschraubt ist. Die Gleitbuchse wird axial gesichert durch einen Ring mit mehreren am Umfang angeordneten Befestigungsschrauben 28 (Fig.2).The locking element 6 is corresponding to the illustrations in Figure 2 and Figure 5 and 6 composed of the following elements. In the side wall 5.1 of the frame 5 and in the side wall of the telescopic section 2, a sleeve 20 is attached, which is the has the same outer and inner diameter as the sleeve 14 for the Coupling element 7. In the sleeve 20 is inserted a sliding bush 21 for Facilitation of the axial sliding of the locking bolt 24. In the bottom area of the Slide bush 21 is a transverse web 29 is arranged, for example, via welding in the sleeve 20 is attached. This crosspiece 29 forms with the sleeve 20 two each other opposite crescent-shaped openings, through which the also sickle-shaped formed webs 22, 23 of the locking bolt 24 are movable (Figure 5). In a central recess 30 of the locking bolt 24 is a spring 25th arranged on the one hand on the front side of the recess of the Locking bolt 24 and on the other hand supported on the transverse web 29. By the Locking pin 24 and through the transverse web 29 extends in the axial center position a screw 26, on the end of the thread a mushroom-shaped Coupling piece 27 is screwed. The sliding bush is secured axially by a Ring with several circumferentially arranged fastening screws 28 (Fig.2).

In den Figuren 7a, b bis 9a - c sind die wesentlichen Phasen für das Entriegeln mit der vorgeschlagenen Vorrichtung dargestellt. Um zu verdeutlichen, dass die vorgeschlagene Vorrichtung auch für mehr als zwei zu teleskopierende Schüsse anwendbar ist, ist in den Figuren 7a, 8a und 9a ein weiterer nicht näher bezeichneter Teleskopschuss dargestellt. Dieser umfaßt die beiden mit 1 und 2 gekennzeichneten Teleskopschüsse. Im Unterschied zu Figur 1 ist in Figur 7a die linke Teilhälfte eines Teleskopauslegers wiedergegeben. Figur 7b zeigt den Längsschnitt von Figur 7a. Vergleichbar wie in Figur 1 und 2 zeigen die Figuren 7a, 7b einen Zustand, bei dem der Teleskopschuss 2 mit dem ihn umfassenden Teleskopschuss 1 verriegelt ist. Es sei angenommen, dass ein weiter innenliegender Teleskopschuss ausgeschoben wurde und das verschiebbare Element 8 der Verschiebeeinrichtung auf dem Rückweg zum nächsten zu greifenden Teleskopschuss 2 ist. Diese Rückbewegung ist in Figur 7b durch einen Pfeil kenntlich gemacht. Dabei passiert die Verschiebeeinrichtung mitsamt den beiden einander gegenüberliegenden Kupplungselementen 7, 7.1 die beiden einander gegenüberliegenden Verriegelungselemente 6, 6.1 des Teleskopschusses 2. Die erforderlichen Sensoren zur Erkennung der richtigen Lageposition sind hier nicht dargestellt. Der Verriegelungsbolzen 24.1 wird durch die Kraft der Feder 25.1 in Verriegelungsposition gehalten. Dies bedeutet, dass der Kopfbereich des Verriegelungsbolzens 24.1 in die in der Seitenwand des einfassenden Schusses 1 angebrachte Ausnehmung 31.1 eingreift. Zur Aufnahme der Gewichtskräfte ist die Ausnehmung 31.1 mit einem ringartigen Einsatz 32.1 verstärkt. Da der in Figur 7b eingezeichnete Pfeil in die Richtung Einteleskopieren zeigt, ergibt sich zwingend, dass durch das Eigengewicht des Teleskopschusses 2 der Kopfbereich des Verriegelungsbolzens 24 auf dem hinteren Randbereich des ringartigen Einsatzes 32.1 zur Anlage kommt.In Figures 7a, b to 9a - c are the essential phases for unlocking with the proposed device shown. To clarify that the proposed device also for more than two shots to be telescoped is applicable, in Figures 7a, 8a and 9a, another unspecified Telescopic shot shown. This includes the two marked 1 and 2 Telescoping sections. In contrast to FIG. 1, in FIG. 7a the left half of the part is a Telescopic boom reproduced. FIG. 7b shows the longitudinal section of FIG. 7a. Comparable as in Figures 1 and 2, Figures 7a, 7b show a state in which the Telescopic section 2 is locked with the telescopic section 1 comprising it. It was assumed that a further telescopic telescope shot was ejected and the displaceable element 8 of the displacement device on the way back to next to be taken telescopic section 2. This return movement is shown in FIG. 7b indicated by an arrow. The shifting device happens along with it the two opposing coupling elements 7, 7.1, the two opposite locking elements 6, 6.1 of the telescopic section. 2 The necessary sensors for detecting the correct position position are not here shown. The locking bolt 24.1 is in by the force of the spring 25.1 Locking position held. This means that the head of the Locking pin 24.1 in the in the side wall of the enclosing shot. 1 mounted recess 31.1 engages. To absorb the weight forces is the Recess 31.1 reinforced with a ring-like insert 32.1. Since the in Figure 7b drawn arrow pointing in the direction Einteleskopieren, it is imperative that by the weight of the telescopic section 2 of the head portion of Locking bolt 24 on the rear edge portion of the annular insert 32.1 comes to the plant.

Die Figuren 8a - 8c zeigen eine weitere Phase des Entriegelungsvorganges. Entsprechend der Darstellung im Teilbild 8b ist mittels des verschiebbaren Elementes 8 der Verschiebeeinrichtung das Kupplungselement 7.1 so weit verschoben worden, bis das Kupplungsteil 15.1 mittels der Kolben-Zylinder-Einheit 9 und des Hebels 11.1 nach links verschoben werden kann. Diese Verschiebung ist erforderlich, damit die querliegende Ausnehmung 19.1 im Kupplungsteil 15.1 in Höhe des Kupplungsstückes 27.1 des Verriegelungselementes 6.1 liegt. Durch Verfahren des Kupplungselementes 7.1 in Richtung Austeleskopieren kommt das Kupplungsstück 27.1 formschlüssig in Eingriff mit der Ausnehmung 19.1 (Teilbild 8c). Durch weiteres Verfahren in Richtung Austeleskopieren kommt die vom liegende Stirnfläche des die Ausnehmung 19.1 tragenden Bereiches des Kupplungsteiles 15.1 auf der Innenseite des Steges 23.1 des Verriegelungsbolzens 24.1 zur Anlage. Über diesen Anschlag kann vom verschiebbaren Element 8 der Verschiebeeinrichtung her Kraft auf das Verriegelungselement 6.1 ausgeübt werden. Dies ermöglicht den Kopfbereich des Verriegelungsbolzens 24.1 vom Randbereich des ringartigen Einsatzes 32.1 wegzubewegen, wie Teilbild 8c zeigt. Erst in dieser Stellung kann der Verriegelungsbolzen 24.1 gezogen werden.FIGS. 8a-8c show a further phase of the unlocking process. As shown in the sub-picture 8b is by means of the displaceable element 8 of the displacement device, the coupling element 7.1 has been moved so far until the coupling part 15.1 by means of the piston-cylinder unit 9 and the lever 11.1 can be moved to the left. This shift is required for the transverse recess 19.1 in the coupling part 15.1 in height of the coupling piece 27.1 of the locking element 6.1 is located. By moving the coupling element 7.1 towards Austeleskopieren comes the coupling piece 27.1 in a form-fitting manner Engagement with the recess 19.1 (part 8c). By further process in the direction Austeleskopieren comes from the lying end face of the recess 19.1 supporting portion of the coupling part 15.1 on the inside of the web 23.1 of Locking bolt 24.1 to the plant. About this stop can from displaceable element 8 of the displacement device forth force on the Locking element 6.1 are exercised. This allows the head area of the Locking bolt 24.1 from the edge region of the ring-like insert 32.1 move away, as part 8c shows. Only in this position can the Locking bolt 24.1 are pulled.

In den Figuren 9a - 9c ist die letzte Phase des Entriegelungsvorganges dargestellt. Nach dem Einkuppeln des Kupplungsstückes 27.1 des Verriegelungsbolzen 24.1 in die Ausnehmung 19.1 des Kupplungsteiles 15.1 wird die hydraulische Kolben-Zylindereinheit 9 aktiviert und entgegen der Kraft der Feder 25.1 das Kupplungsteil 15.1 mittels des Hebels 11.1 nach rechts bewegt. Durch den formschlüssigen Verbund bewegt sich gleichzeitig der Verriegelungsbolzen 24.1 aus der Ausnehmung 31.1 des einfassenden Teleskopschusses 1 heraus und damit sind die beiden Teleskopschüsse 1, 2 entriegelt, wobei in der hier nicht dargestellten rechten Teilhälfte der Verriegelungsbolzen 24 auf die gleiche Art und Weise mittels des Kupplungsteiles 15 gezogen worden ist. Bei der Bewegung des Verriegelungsbolzens 24.1 nach rechts ist der Steg 23.1 in die dafür vorgesehene Ausnehmung 18.1 des Kupplungsteiles 15.1 geschoben worden (siehe hierzu Figur 4). Der zweite gegenüberliegende Steg 22.1 ist bei dieser Bewegung ebenfalls nach rechts über die Hülse 20 hinaus bewegt worden. Im letzten Teilbild 9c ist dargestellt, wie nach dem Kupplungs- und Entriegelungsvorgang der Teleskopschuss 2 mittels des verschiebbaren Elementes 8 der Verschiebeeinrichtung axial in Richtung Austeleskopieren bewegt worden ist. Diese Bewegung in Richtung Austeleskopieren ist durch einen Pfeil im Teilbild 9c kenntlich gemacht. Die Entkupplung bzw. Verriegelung der einzelnen Teleskopschüsse erfolgt in der umgekehrten Reihenfolge wie zuvor geschildert. FIGS. 9a-9c show the last phase of the unlocking process. After engaging the coupling piece 27.1 of the locking pin 24.1 in the Recess 19.1 of the coupling part 15.1 is the hydraulic piston-cylinder unit 9 activated and against the force of the spring 25.1 the coupling part 15.1 moved by the lever 11.1 to the right. Due to the positive connection simultaneously moves the locking pin 24.1 from the recess 31.1 of bordering telescopic shot 1 out and thus are the two telescopic shots 1, 2 unlocked, wherein in the right half of the part, not shown here Locking bolt 24 in the same manner by means of the coupling part 15th has been drawn. In the movement of the locking bolt 24.1 to the right the web 23.1 in the designated recess 18.1 of the coupling part 15.1 pushed (see Figure 4). The second opposing web 22.1 is has also been moved to the right over the sleeve 20 during this movement. In the last panel 9c is shown as after the clutch and Unlocking operation of the telescopic section 2 by means of the displaceable element. 8 the displacement device has been moved axially in the direction of telescoping. This movement towards telescoping is indicated by an arrow in sub-picture 9c indicated. The decoupling or locking of the individual telescopic shots takes place in the reverse order as previously described.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Teleskopschusstelescoping
22
Teleskopschusstelescoping
33
GleitelementSlide
44
GleitelementSlide
55
Rahmengestellframe
5.15.1
Seitenwand RahmengestellSidewall frame
66
Verriegelungselementlocking element
77
Kupplungselementcoupling member
88th
verschiebbares Elementsliding element
99
Kolben-ZylindereinheitPiston-cylinder unit
1010
Doppelpfeildouble arrow
1111
Hebellever
1212
Gestängelinkage
1313
Bolzenbolt
1414
Hülse KupplungselementSleeve coupling element
1515
Kupplungsteilcoupling part
16,1716.17
Ausnehmungen HülseRecesses sleeve
1818
Ausnehmung KupplungsteilRecess coupling part
1919
T-förmige Ausnehmung KupplungsteilT-shaped recess coupling part
2020
Hülse VerriegelungselementSleeve locking element
2121
Gleitbuchsebush
22,2322.23
stegartige Fortsätze des Verriegelungsbolzensweb-like extensions of the locking bolt
2424
Verriegelungsbolzenlocking bolt
2525
Federfeather
2626
Schraubescrew
2727
Kupplungsstückcoupling
2828
Befestigungsschraubefixing screw
2929
Querstegcrosspiece
3030
mittige Ausnehmung des Verriegelungsbolzenscentral recess of the locking bolt
3131
Aufnahmeadmission
3232
Ringartiger EinsatzRing-like use

Claims (17)

  1. A crane having a telescopic boom, whose extendable sections may be extended and retracted by coupling to a displacement device after disengagement of locking bolt connections and may be locked in the respective extended or retracted position, a coupling and locking unit, which may be coupled to the extendable sections via a coupling element, being provided on the displaceable element of the displacement device and at least one locking element being arranged on each extendable section at the rear end thereof on the inside, which locking element may be connected to the coupling and locking unit and may be pushed into and out of a receptacle in the section encompassing the telescoping section,
    characterised in that,
    on the displaceable element (8) of the displacement device retracting and extending the telescopic sections (1, 2), there is provided at least one coupling element (7, 7.1) lying perpendicular to the axis of the displacement device and having a coupling part (15, 15.1) movable in the radial direction, which coupling part (15, 15.1) may be coupled in form-fitting manner to a coaxially movable locking bolt (24, 24.1) of a locking element (6, 6.1), wherein in the unlocked position the locking bolt (24, 24.1), in conjunction with the coupling part (15, 15.1), constitutes the coupling between the displacement device (8) and the respective telescopic section (2) to be retracted and extended, wherein in each case a projecting area of the coupling part (15, 15.1) and of the locking bolt (24, 24.1) rest form-fittingly against one another in the transition phase between unlocking and locking.
  2. A crane according to claim 1,
    characterised in that
    the displacement device is a rope drive.
  3. A crane according to claim 1,
    characterised in that
    the displacement device is a hydraulic piston/cylinder unit.
  4. A crane according to claims 1 and 3,
    characterised in that
    the piston rod is the stationary element of the piston/cylinder unit and the coupling element (7, 7.1) is arranged in the end area of the cylinder from which the piston rod exits.
  5. A crane according to claims 1 and 3,
    characterised in that
    the cylinder is the stationary element of the piston/cylinder unit and a crossbar is attached to the front end of the piston rod, on which crossbar there is arranged at least one guide element lying at a distance from and parallel to the cylinder housing, the rear end area of which guide element is connected to the coupling element (7, 7.1).
  6. A crane according to claims 1 - 5,
    characterised in that
    the locking bolt (24, 24.1) is spring-loaded (25, 25.1) and comprises a coupling piece (27, 27.1) at its inner end.
  7. A crane according to any one of claims 1 - 6,
    characterised in that
    the coupling element (7, 7.1) comprises a sleeve (14, 14.1), which is attached to the displaceable element (8) of the displacement device and in which a coupling part (15, 15.1) is displaceably arranged, which is connected on the one hand to an actuating element arranged on the displacement device and which comprises, in the area facing the locking element (6, 6.1), a recess (19, 19.1) for receiving the coupling piece (27, 27.1) and a further recess (18, 18.1) for receiving a portion (23, 23.1) of the locking bolt (24, 24.1).
  8. A crane according to any one of claims 1 - 7,
    characterised in that
    the locking element (6, 6.1) comprises a sleeve (20, 20.1) fitted in a recess in the telescopic sections (2) to be telescoped, in which sleeve (20, 20.1) there is displaceably arranged the locking bolt (24, 24.1), which is provided with the coupling piece (27, 27.1) on the side facing the coupling element (7, 7.1).
  9. A crane according to claims 6 - 8,
    characterised in that
    the coupling piece (27, 27.1) comprises a shank and a mushroom-like end piece attached thereto, which end piece may be pushed into and out of a T-shaped recess (19, 19.1) in the coupling part (15, 15.1).
  10. A crane according to claims 8 and 9,
    characterised in that
    a slide bush (21, 21.1) is fitted in the sleeve (20, 20.1) and a cross-web (29, 29.1) connected to the sleeve (20, 20.1) is arranged in the base area of the slide bush (21, 21.1), which cross-web forms crescent-shaped openings with the sleeve (20, 20.1), through which openings web-like extensions (22, 22.1, 23, 23.1) of the locking bolt (24, 24.1) may pass, wherein one web-like extension (23, 23.1) may be pushed into and out of the corresponding recess (18, 18.1) in the coupling part (15, 15.1).
  11. A crane according to claim 10,
    characterised in that
    the locking bolt (24, 24.1) comprises a centrally located recess (30, 30.1), in which a spring (25, 25.1) may be arranged, which rests with its other end on the cross-web (29, 29.1).
  12. A crane according to claim 11,
    characterised in that
    a screw (26, 26.1) passing through the locking bolt (24, 24.1) and the cross-web (29, 29.1) is arranged in the central axis of the locking bolt (24, 24.1), on the threaded end of which screw (26, 26.1) there may be screwed the coupling piece (27, 27.1).
  13. A crane according to any one of claims 1 - 12,
    characterised in that
    the coupling part (15, 15.1) may be actuated by a means arranged in the end area of the displaceable element (8) of the displacement device.
  14. A crane according to claim 13,
    characterised in that
    the means is a hydraulic piston/cylinder unit (9), which is arranged perpendicularly to the longitudinal axis of the displacement device.
  15. A crane according to any one of claims 1 - 14,
    characterised in that
    only one locking element (6) is arranged centrally at the top or centrally at the bottom in the respective telescopic section (1, 2) to be extended and the associated receptacle (31) of the respective encompassing telescopic section is located in the top wall or in the bottom wall.
  16. A crane according to any one of claims 1 - 14,
    characterised in that
    two mutually opposing coupling elements (7, 7.1) are attached at the end area of the displaceable element (8) of the displacement device, the axes of which intersect with the central axis of the displacement device at a right angle and which may be coupled to two likewise mutually opposing locking elements (6, 6.1) by means of coupling part (15, 15.1) and locking bolt (24, 24.1).
  17. A crane according to claim 16,
    characterised in that
    the two locking elements (6, 6.1) are arranged in the two mutually opposing side wall areas of the telescopic section (2) in each case to be extended and the associated receptacle (31, 31') of the respective encompassing telescopic section (1) is likewise located in the side wall area.
EP00250048A 1999-04-29 2000-02-16 Crane with a telescopic boom Expired - Lifetime EP1055635B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19920634 1999-04-29
DE19920634 1999-04-29
DE10007773 2000-02-14
DE10007773A DE10007773B4 (en) 1999-04-29 2000-02-14 Crane with a telescopic boom

Publications (3)

Publication Number Publication Date
EP1055635A2 EP1055635A2 (en) 2000-11-29
EP1055635A3 EP1055635A3 (en) 2003-09-17
EP1055635B1 true EP1055635B1 (en) 2005-01-12

Family

ID=26004434

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00250048A Expired - Lifetime EP1055635B1 (en) 1999-04-29 2000-02-16 Crane with a telescopic boom

Country Status (2)

Country Link
EP (1) EP1055635B1 (en)
AT (1) ATE286849T1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006019308U1 (en) * 2006-12-21 2008-04-30 Liebherr-Werk Ehingen Gmbh telescopic section
DE202007002203U1 (en) 2007-02-14 2008-06-26 Liebherr-Werk Ehingen Gmbh telescopic section
CN105712219B (en) * 2016-05-06 2017-12-08 北汽福田汽车股份有限公司 A kind of crane and its telescopic jib
WO2019178067A1 (en) * 2018-03-12 2019-09-19 Manitowoc Crane Companies, Llc Pinned telescoping crane boom
CN113415742B (en) * 2021-08-02 2023-06-23 王凯 Crane telescopic boom sliding block assembly

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3510710A1 (en) * 1985-03-23 1986-10-02 Fried. Krupp Gmbh, 4300 Essen TELESCOPIC CRANE
DE3908571A1 (en) * 1989-03-16 1990-09-20 Century Ii Gmbh Mobilkrane Device for at least occasionally coupling the last two telescopic jib sections, guided one inside the other, of a crane jib
DE4344795A1 (en) * 1993-12-28 1995-06-29 Liebherr Werk Ehingen Mobile crane with a telescopic boom
DE19641191A1 (en) * 1996-09-24 1998-03-26 Mannesmann Ag Telescopic jib for stationary or mobile cranes
DE19824671C2 (en) * 1997-05-28 2002-09-19 Mannesmann Ag Crane with a telescopic boom

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ATE286849T1 (en) 2005-01-15
EP1055635A2 (en) 2000-11-29

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