EP1373120A1 - Telescopic boom for a vehicle crane - Google Patents

Telescopic boom for a vehicle crane

Info

Publication number
EP1373120A1
EP1373120A1 EP02716594A EP02716594A EP1373120A1 EP 1373120 A1 EP1373120 A1 EP 1373120A1 EP 02716594 A EP02716594 A EP 02716594A EP 02716594 A EP02716594 A EP 02716594A EP 1373120 A1 EP1373120 A1 EP 1373120A1
Authority
EP
European Patent Office
Prior art keywords
telescopic
telescopic boom
locking
sections
boom according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02716594A
Other languages
German (de)
French (fr)
Other versions
EP1373120B1 (en
Inventor
Walter Stowasser
Klaus Conrad
Oliver Fries
Werner Michaeli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Terex Demag GmbH and Co KG
Original Assignee
Terex Demag GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Terex Demag GmbH and Co KG filed Critical Terex Demag GmbH and Co KG
Publication of EP1373120A1 publication Critical patent/EP1373120A1/en
Application granted granted Critical
Publication of EP1373120B1 publication Critical patent/EP1373120B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B66C23/702Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic with a jib extension boom
    • 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
    • B66C23/705Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
    • 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 telescopic boom for a mobile crane with the
  • a mobile crane with a generic telescopic boom is from the
  • the mobile crane disclosed there has an undercarriage provided with a road undercarriage and an uppercarriage rotatably arranged thereon about a vertical axis.
  • the superstructure is provided with a telescopic boom, which has a basic box, which has a horizontal swivel joint at its lower end for attachment to the superstructure.
  • Another swivel joint is arranged approximately in the central region of the base box on its underside. This swivel is used to link a hydraulic
  • Luffing cylinder which in turn is rotatably mounted on the superstructure and is used to erect the telescopic boom and to hold the inclined position required in each case during work.
  • a large number of telescopic sections are arranged in the basic box, which are guided one inside the other or in the basic box (outermost telescopic section). All telescopic sections can be extended from their retracted position into a telescopic position by means of a telescopic system which can be coupled directly to the telescopic section to be moved and which is preferably designed as a hydraulic cylinder-piston system.
  • the telescopic sections can be mechanically locked against each other in the telescopic position so that they cannot move back under the influence of the load to be lifted or the dead weight when tilted.
  • One of the telescopic sections of this telescopic boom consists of two sections in its axial length, which can be pivoted relative to one another by means of a hinge, so that there is an angling within this telescopic section.
  • a locking device By means of a locking device, the two sections with respect to their longitudinal axes in one coaxial alignment and locked together in at least one angled position.
  • This locking device is designed as a hydraulic cylinder-piston unit and is arranged on the outside of the bendable telescopic section in such a way that the cylinder is pivotably mounted in a bearing block connected to the outside of a portion of the bendable telescopic section, while the piston rod of the cylinder-piston Unit is articulated by means of a swivel joint on a holding arm which is fixedly connected on the outside to the other section of the bendable telescopic section.
  • the two sections On the underside of the bendable telescopic section, the two sections are connected to each other with a hinge that is also on the outside.
  • the angle of the bendable telescopic section is located approximately in the upper fifth of this telescopic section.
  • the angled telescopic section can only be inserted up to the angling point in the next largest telescopic section. Since the permissible transport length of the boom is limited in the partially copied state, the telescopic sections surrounding the bendable telescopic section and the basic unit are shorter than in a comparable mobile crane without a bendable telescopic section. The maximum extendable length of the telescopic boom is thus reduced.
  • the object of the present invention is to improve a telescopic boom of the generic type in such a way that the telescopic length of the boom is significantly increased without the need to use an additional boom.
  • the hinge and the locking device of the bendable telescopic section are arranged so that they lie within the inner contour of the next largest telescopic section. This makes it possible to completely retract the telescopic section that can be angled into the next largest telescopic section by means of the telescopic device.
  • the next largest and all other larger telescopic sections can thus maintain the full length as with a conventional telescopic boom.
  • the hinge and the locking device are expediently arranged such that they do not protrude beyond the outer contour specified by the respective hollow profile of the telescopic sections, that is to say are arranged in the interior of the hollow profile.
  • the innermost telescopic section is preferably designed as an angled telescopic section. In principle, however, it is also possible to design a telescopic section that is further out, such as the penultimate or third-to-last telescopic section. In any case, it is preferred that the bendable telescopic section is arranged in the upper third of the fully extended length of the telescopic boom.
  • the hinge may protrude slightly from the outer contour of the hollow profile of the bendable telescopic section, since there is regularly a certain minimum distance between two telescopic sections that are inserted into one another, it is advisable to arrange the hinge completely on the underside of the bendable telescopic section.
  • It expediently has at least one, in particular a pair of hinge pins, each of which interacts with a hinge plate and a hinge fork, the hinge plate being connected to one section and the hinge fork to the other section of the angled joint section.
  • the locking device is also expediently arranged completely on the inside of the top of the bendable telescopic section, so that the outer contour of the hollow profile of the bendable telescopic section is not or only slightly exceeded.
  • the locking device of the telescopic boom according to the invention can be formed by one or more hydraulic cylinder-piston systems or, for example, also by one or more threaded spindle drives, which are each arranged on the inside of the two sections of the bendable telescopic section. This allows a stepless adjustment of the angle between the two sections. However, this is generally not necessary. Therefore, a solution is preferred in the context of the present invention in which the Locking device is designed as a bolt locking system, which is a simple and therefore particularly inexpensive and less prone to failure solution.
  • At least one locking pin in particular a
  • a pair of locking bolts are provided which, in the case of coaxial alignment of the longitudinal axes of the sections of the bendable telescopic section, to achieve locking of this coaxial alignment in each case in mutually coaxial bores of a locking fork which is connected to one section and a locking tab which is connected to the other section.
  • the diameter of the coaxial bores corresponds to the diameter of the locking bolts.
  • Locking device preferably has a retaining tab, which is each connected to a retaining fork by retaining bolts, the retaining forks in turn being firmly connected on the inside to one of the two sections of the bendable telescopic section.
  • the holding tab is expediently provided with an elongated hole along its longitudinal axis, the diameter (width) of which corresponds to the diameter of the
  • Holding bolt corresponds so that they can slide relatively through the slot.
  • the axial length of this elongated hole is designed such that the two retaining bolts in the angled position of the two sections lie in the two end regions of the elongated hole on the respective semi-cylindrical inner surfaces, so that a stop position is given.
  • the two retaining bolts can slide freely within the elongated hole, so that the stretching is possible without removing the retaining bolts.
  • Elongated holes are used.
  • the use of a single such combination is entirely sufficient.
  • the invention provides that the locking bolts are each fastened to a bolt carrier which is parallel to the axes of the
  • the bolt carrier can preferably be moved by means of a threaded spindle drive.
  • the drive for the movement of the bolt carrier can be hydraulic, pneumatic, electromotive or even electromagnetic. However, is preferred because of the particularly simple, low-interference and both in terms of
  • a drive of a threaded spindle drive for the bolt carrier by means of a hand crank In order to require as little installation space as possible with a view to not exceeding the outer contour of the hollow profile of the bendable telescopic section, such a hand crank can be designed to be removable.
  • the hand crank preferably has one
  • this hand crank can be pulled out of the interior of the hollow section of the telescopic section through a corresponding opening in its side wall and brought into the working position. It is also particularly advisable to equip this hand crank with a foldable handle.
  • FIG. 1 shows a telescopic boom according to the invention in a fully retracted position and in a position with telescoped angled innermost telescopic section
  • 3 is a plan view of the kink
  • Fig. 6 is an axial cross section along line C - C in Fig. 4 and
  • FIG. 7 shows a section along line BB in FIG. 5.
  • a telescopic boom according to the invention is shown in axial longitudinal section in two positions.
  • all telescopic sections that can be telescoped out of a basic box 1 of the telescopic boom are
  • the basic box is provided at its lower (right) end with a swivel joint 2, with which the telescopic boom according to the invention can be fastened pivotably about a horizontal axis of rotation on the superstructure of a mobile crane.
  • a further swivel joint 2 is arranged, which also has a horizontal axis of rotation and is used to connect a hydraulic luffing cylinder with which the telescopic boom can perform the tasks required for each task
  • FIGS. 2 to 7. The construction and functioning of the kink 32 of the telescopic boom according to the invention can be seen in detail from the further FIGS. 2 to 7.
  • Figure 2 shows the kink as a side view in a telescopic position, in which the two sections 4a, 4b of the bendable telescopic section 4 are aligned in a coaxial position and are fixed in this position against each other.
  • a hinge is arranged on the inside of the hollow profile of the two sections 4a, 4b, which, as can be seen in particular from FIG. 5, has two hinge pins 13a, 13b and two hinge plates 14a, 14b and two hinge forks 15a, 15b.
  • the joint plates 14a, 14b are each inserted into the space formed by the mutually parallel sheet metal parts of the joint forks 15a, 15b and both are provided with coaxial bores, the diameter of which corresponds to the diameter of the respective joint bolt 13a, 13b.
  • the hinge pins are inserted into these holes and axially fixed, so that a hinge is created as a permanent hinge.
  • structural precautions have been taken as a locking device which correspond to the hinge on the lower side.
  • the locking pin 16a, 16b are drawn in the locking position. Under these conditions, the innermost telescopic section 4 behaves like a conventional one-piece telescopic section, so it can be telescoped in and out.
  • the locking bolts 16a, 16b are each fastened at the end face by means of a screw connection to the upper end of a bolt carrier 23a, 23b, which has a threaded bore running at its lower end parallel to the longitudinal axis of the locking bolt 16a, 16b (FIG. 5). Both bolt carriers 23a, 23b are arranged parallel to one another in such a way that the two threaded bores are aligned coaxially.
  • An adjusting shaft 24 is guided through the threaded bores and has two threaded sections 25a, 25b corresponding to the threaded bores. Like the two threaded bores, the two threaded sections 25a, 25b have pitches which are opposite to one another.
  • Adjustment shaft 24 therefore, the two bolt carriers 23a, 23b are either moved towards or away from one another, depending on the direction of rotation. In this way, the locking bolts 16a, 16b can be moved out of or into the bores of the locking tabs 17a, 17b and locking forks 18a, 18b as required. So that the bolt carriers 23a, 23b cannot rotate with the adjusting shaft 24, they are guided in slots 27a, 27b (FIGS. 5 and 7) in a rotationally fixed but longitudinally displaceable manner.
  • the adjusting shaft 24 is rotatably mounted within the section 4a of the telescopic section 4 and axially immovable.
  • the adjusting shaft 24 is designed as a hollow shaft and is provided with an elongated hole 30 which extends parallel to the longitudinal axis of the adjusting shaft 24.
  • the drive axis 28 of the hand crank 26 can be inserted.
  • the drive axle 28 has a radially projecting driver pin 29 which projects through the elongated hole 30.
  • the driving pin 29 forms a stop for pulling the drive shaft 28 out of the hollow shaft part of the adjusting shaft 24.
  • this driving pin 30 creates a rotationally fixed connection between the driving shaft 28 and the adjusting shaft 24.
  • the hollow shaft part 24 has a length corresponding to the axial length of the drive axis 28, the hand crank 26 can be pushed completely into the hollow profile in this way, as can be seen from FIG. 6.
  • the handle of the crank handle 26 can advantageously be folded up, so that no disruptive parts protrude beyond the outer contour of the hollow profile in the folded state.
  • the locking by the locking bolts 16a, 16b must be released by a corresponding actuation of the adjusting shaft 24, that is, the locking bolts 16a, 16b from the assigned bores in the locking fork 18a, 18b and the locking tab 17a, 17b are moved out.
  • the locking pin 16a, 16b each still in the bore of the respective inner
  • the locking tab 17a, 17b is pivoted out of the associated locking fork 18a, 18b in the angled position of the two sections 4a, 4b.
  • a corresponding holding device is provided in the upper part of the hollow profile of the telescopic section 4, which prevents the load to be lifted or its own weight from acting of the angled section 4a, the angle between the two sections 4a, 4b can change beyond a predetermined value.
  • This holding device is in the middle between the two
  • Locking forks 18a, 18b arranged and has two holding forks 21 a, 21 b, which are each attached to one of the two sections 4a, 4b.
  • a holding bracket 20 is positioned between the holding forks 21 a 21 b and is provided with an elongated hole 22 which extends in the direction of the longitudinal axis of the holding bracket 20.
  • the two holding forks 21 a, 21 b are each provided with through holes, in each a retaining bolt 19a, 19b is axially immovably inserted.
  • the diameter or the width of the elongated hole 22 correspond to the diameter of the retaining bolts 19a, 19b, so that the retaining tab 20, the elongated hole 22 of which has a length which is substantially greater than the center distance of the two retaining bolts 19a, 19b (FIG. 3), is slidably supported by the retaining bolts 19a, 19b. Therefore, as shown in Fig. 4, the two sections 4a, 4b can be pivoted against each other about the common axis of the hinge pins 13a, 13b and are limited in this pivoting movement only when the end stop position of the two retaining bolts 19a, 19b in the slot 22 , FIGS. 2 and 3 also show the arrangement of a sensor 31 with which it can be monitored whether the hand crank 26 is properly inserted and does not hinder the copying of the telescopic section 4.
  • a telescopic boom is created, the telescopic sections of which can be extended by means of a common telescopic device and whose length, including the length of the basic box, does not have to accept any shortenings compared to a conventional telescopic boom, since the kinking point of the telescopic telescopic section completely surrounds the respective telescopic section that can be bent Telescopic shot is retractable.
  • Precautions can be of a purely mechanical nature and are therefore comparatively inexpensive and in any case extremely reliable. Since only very little effort is required to actuate the unlocking of the kinking point and the kinking is comparatively rarely necessary, this actuation can easily be done by hand.
  • the boom tip In order to bring the bent telescopic section back into a coaxial alignment of its two pieces, the boom tip only needs to be placed on a base (e.g. ground) and lowered further until the holes in the locking tabs and locking forks are aligned and the locking bolts can be retracted , Then the last piece of the telescopic boom can be fully telescoped.
  • a base e.g. ground

Landscapes

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

Abstract

The invention relates to a telescopic boom for a vehicle crane, comprising a base housing (1), which may be mounted to an upper construction on the vehicle crane in a horizontal joint (2), at the lower end thereof and has a further horizontal joint (3), to which a tipping cylinder, for inclination of the telescopic boom, which may be connected to the upper construction, may be connected and several telescopic stages (4-11), running either in each other, or in the base housing (1), all of which may be telescoped by means of a telescoping device (12) directly connected thereto and which may be locked relative to each other in the telescoped position. One of the telescoping stages (4-11) is embodied from two part pieces (4a, b) in the axial direction thereof, as a bending telescopic stage (4), and both part pieces (4a, b) are pivoted together by means of a hinge. The part pieces (4a, b) may be locked together by means of a locking device in respect of their longitudinal axis in a coaxial orientation and in at least one position, bent relative to each other. According to the invention, the hinge and locking device on the bending telescopic stage (4) lie within the internal contour of the next largest telescopic stage (5).

Description

Teleskopausleger für einen Fahπεeugkran Telescopic boom for a mobile crane
Beschreibungdescription
Die Erfindung betrifft einen Teleskopausleger für einen Fahrzeugkran mit denThe invention relates to a telescopic boom for a mobile crane with the
Merkmalen des Oberbegriffs des Patentanspruchs 1.Features of the preamble of claim 1.
Ein Fahrzeugkran mit einem gattungsgemäßen Teleskopausleger ist aus derA mobile crane with a generic telescopic boom is from the
EP 0 970 914 A2 bekannt. Der dort offenbarte Fahrzeugkran weist einen mit einem Straßenfahrwerk versehenen Unterwagen und einen um eine vertikale Achse drehbar darauf angeordneten Oberwagen auf. Der Oberwagen ist mit einem Teleskopausleger versehen, der einen Grundkasten aufweist, welcher an seinem unteren Ende ein horizontales Drehgelenk zur Befestigung am Oberwagen besitzt. Ein weiteres Drehgelenk ist etwa im Mittelbereich des Grundkastens an dessen Unterseite angeordnet. Dieses Drehgelenk dient zur Anlenkung eines hydraulischenEP 0 970 914 A2 known. The mobile crane disclosed there has an undercarriage provided with a road undercarriage and an uppercarriage rotatably arranged thereon about a vertical axis. The superstructure is provided with a telescopic boom, which has a basic box, which has a horizontal swivel joint at its lower end for attachment to the superstructure. Another swivel joint is arranged approximately in the central region of the base box on its underside. This swivel is used to link a hydraulic
Wippzylinders, der seinerseits drehbar am Oberwagen gelagert ist und zur Aufrichtung des Teleskopauslegers und zum Halten der jeweils im Arbeitseinsatz gewünschten Schrägstellung dient. In dem Grundkasten sind eine Vielzahl von Teleskopschüssen angeordnet, die ineinander bzw. im Grundkasten (äußerster Teleskopschuss) geführt sind. Sämtliche Teleskopschüsse können aus ihrer eingefahrenen Position mittels eines jeweils ah den zu verfahrenden Teleskopschuss unmittelbar ankoppelbaren Telekopiersystems, das vorzugsweise als hydraulisches Zylinder-Kolben-System ausgebildet ist, in eine teleskopierte Stellung ausgefahren werden. Die Teleskopschüsse sind in der teleskopierten Stellung mechanisch gegeneinander verriegelbar, damit sie sich unter Einwirkung der zu hebenden Last oder des Eigengewichts bei Schrägstellung nicht zurückschieben können. Einer der Teleskopschüsse dieses Teleskopauslegers besteht in seiner axialen Länge aus zwei Teilstücken, die mittels eines Scharniers zueinander verschwenkbar sind, so dass sich eine Abwinkelung innerhalb dieses Teleskopschusses ergibt. Mittels einer Sperrvorrichtung können die beiden Teilstücke hinsichtlich ihrer Längsachsen in einer koaxialen Ausrichtung und in mindestens einer zueinander abgewinkelten Stellung miteinander verriegelt werden. Diese Sperrvorrichtung ist als hydraulische Zylinder- Kolben-Einheit ausgebildet und ist außen an dem abwinkelbaren Teleskopschuss in der Weise angeordnet, dass der Zylinder in einem mit dem einen Teilstück des abwiπkelbaren Teleskopschusses außen verbundenen Lagerbock schwenkbar gelagert ist, während die Kolbenstange der Zylinder-Kolben-Einheit mittels eines Drehgelenks an einem Haltearm angelenkt ist, der außen mit dem anderen Teilstück des abwinkelbaren Teleskopschusses fest verbunden ist. An der Unterseite des abwinkelbaren Teleskopschusses sind die beiden Teilstücke mit einem ebenfalls außen liegenden Scharnier miteinander verbunden. Die Abwinkelstelle des abwinkelbaren Teleskopschusses ist etwa im oberen Fünftel dieses Teleskopschusses angeordnet. Wegen der Anordnung des Scharniers und der Sperrvorrichtung kann der abwinkelbare Teleskopschuss nur bis zu der Abwinkelstelle in den nächst größeren Teleskopschuss eingefahren werden. Da die zulässige Transportlänge des Auslegers im einteieskopierten Zustand begrenzt ist, sind die den abwinkelbaren Teleskopschuss umgebenden Teleskopschüsse sowie der Grundkasten kürzer ausgeführt als bei einem vergleichbaren Fahrzeugkran ohne abwinkelbaren Teleskopschuss. Somit ist die maximal ausfahrbare Länge des Teleskopauslegers vermindert.Luffing cylinder, which in turn is rotatably mounted on the superstructure and is used to erect the telescopic boom and to hold the inclined position required in each case during work. A large number of telescopic sections are arranged in the basic box, which are guided one inside the other or in the basic box (outermost telescopic section). All telescopic sections can be extended from their retracted position into a telescopic position by means of a telescopic system which can be coupled directly to the telescopic section to be moved and which is preferably designed as a hydraulic cylinder-piston system. The telescopic sections can be mechanically locked against each other in the telescopic position so that they cannot move back under the influence of the load to be lifted or the dead weight when tilted. One of the telescopic sections of this telescopic boom consists of two sections in its axial length, which can be pivoted relative to one another by means of a hinge, so that there is an angling within this telescopic section. By means of a locking device, the two sections with respect to their longitudinal axes in one coaxial alignment and locked together in at least one angled position. This locking device is designed as a hydraulic cylinder-piston unit and is arranged on the outside of the bendable telescopic section in such a way that the cylinder is pivotably mounted in a bearing block connected to the outside of a portion of the bendable telescopic section, while the piston rod of the cylinder-piston Unit is articulated by means of a swivel joint on a holding arm which is fixedly connected on the outside to the other section of the bendable telescopic section. On the underside of the bendable telescopic section, the two sections are connected to each other with a hinge that is also on the outside. The angle of the bendable telescopic section is located approximately in the upper fifth of this telescopic section. Because of the arrangement of the hinge and the locking device, the angled telescopic section can only be inserted up to the angling point in the next largest telescopic section. Since the permissible transport length of the boom is limited in the partially copied state, the telescopic sections surrounding the bendable telescopic section and the basic unit are shorter than in a comparable mobile crane without a bendable telescopic section. The maximum extendable length of the telescopic boom is thus reduced.
Aufgabe der vorliegenden Erfindung ist es, einen Teleskopausleger der gattungsgemäßen Art dahingehend zu verbessern, dass ohne die Notwendigkeit der Verwendung eines Zusatzauslegers die teleskopierbare Länge des Auslegers deutlich vergrößert wird.The object of the present invention is to improve a telescopic boom of the generic type in such a way that the telescopic length of the boom is significantly increased without the need to use an additional boom.
Gelöst wird diese Aufgabe durch die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.This object is achieved by the features specified in the characterizing part of patent claim 1. Advantageous developments of the invention result from the dependent claims.
Die vorliegende Erfindung vermeidet den Nachteil einer Verkürzung der bezüglich des abwickelbaren Teleskopschusses rückwärtigen Teleskopschüsse und desThe present invention avoids the disadvantage of shortening the telescopic sections rearward with respect to the developable telescopic section and the
Grundkastens dadurch, dass das Scharnier und die Sperrvorrichtung des abwinkelbaren Teleskopschusses so angeordnet werden, dass sie innerhalb der Innenkontur des nächstgrößeren Teleskopschusses liegen. Dadurch ist es möglich, den abwinkelbaren Teleskopschuss vollständig in den nächstgrößeren Teleskopschuss mittels der Teleskopiervorrichtung einzufahren. Der nächstgrößere und alle weiteren größeren Teleskopschüsse können somit die volle Länge wie bei einem konventionellen Teleskopausleger beibehalten. Zweckmäßigerweise wird das Scharnier und die Sperrvorrichtung so angeordnet, dass sie die von dem jeweiligen Hohlprofil der Teleskopschüsse vorgegebene äußere Kontur nicht überragen, d.h. im Inneren des Hohlprofils angeordnet sind.Basic box in that the hinge and the locking device of the bendable telescopic section are arranged so that they lie within the inner contour of the next largest telescopic section. This makes it possible to completely retract the telescopic section that can be angled into the next largest telescopic section by means of the telescopic device. The next largest and all other larger telescopic sections can thus maintain the full length as with a conventional telescopic boom. The hinge and the locking device are expediently arranged such that they do not protrude beyond the outer contour specified by the respective hollow profile of the telescopic sections, that is to say are arranged in the interior of the hollow profile.
Vorzugsweise wird der innerste Teleskopschuss als abwinkelbarer Teleskopschuss ausgestaltet. Es ist aber auch grundsätzlich möglich, einen weiter außen liegenden Teleskopschuss abwinkelbar zu gestalten, also beispielsweise den vorletzten oder drittletzten Teleskopschuss. In jedem Fall bevorzugt ist es, dass der abwinkelbare Teleskopschuss im oberen Drittel der voll ausgefahrenen Länge des Teleskopauslegers angeordnet ist.The innermost telescopic section is preferably designed as an angled telescopic section. In principle, however, it is also possible to design a telescopic section that is further out, such as the penultimate or third-to-last telescopic section. In any case, it is preferred that the bendable telescopic section is arranged in the upper third of the fully extended length of the telescopic boom.
Wenngleich das Scharnier die Außenkontur des Hohlprofils des abwinkelbaren Teleskopschusses leicht überragen darf, da zwischen zwei ineinander geführten Teleskopschüssen regelmäßig ein gewisser Mindestabstand besteht, empfiehlt es sich, das Scharnier vollständig innenliegend an der Unterseite des abwinkelbaren Teleskopschusses anzuordnen. Zweckmäßigerweise weist es mindestens einen, insbesondere ein Paar Gelenkbolzen auf, die jeweils mit einer Gelenklasche und einer Gelenkgabel zusammenwirken, wobei die Gelenklasche mit dem einen Teilstück und die Gelenkgabel mit dem anderen Teilstück des abwinkelbaren Gelenkschusses verbunden ist.Although the hinge may protrude slightly from the outer contour of the hollow profile of the bendable telescopic section, since there is regularly a certain minimum distance between two telescopic sections that are inserted into one another, it is advisable to arrange the hinge completely on the underside of the bendable telescopic section. It expediently has at least one, in particular a pair of hinge pins, each of which interacts with a hinge plate and a hinge fork, the hinge plate being connected to one section and the hinge fork to the other section of the angled joint section.
In entsprechender Weise wird die Sperrvorrichtung ebenfalls zweckmäßig vollständig innenliegend an der Oberseite des abwinkelbaren Teleskopschusses angeordnet, so dass die Außenkontur des Hohlprofils des abwinkelbaren Teleskopschusses möglichst nicht oder nur wenig überragt wird.In a corresponding manner, the locking device is also expediently arranged completely on the inside of the top of the bendable telescopic section, so that the outer contour of the hollow profile of the bendable telescopic section is not or only slightly exceeded.
Die Sperrvorrichtung des erfindungsgemäßen Teleskopauslegers kann durch einen oder auch mehrere hydraulische Zylinder-Kolben-Systeme oder beispielsweise auch durch einen oder mehrere Gewindespindeltriebe gebildet werden, die jeweils auf der Innenseite der beiden Teilstücke des abwinkelbaren Teleskopschusses angeordnet sind. Hierdurch lässt sich eine stufenlose Einstellung des Winkels zwischen den beiden Teilstücken ermöglichen. Dies ist jedoch im Regelfall gar nicht erforderlich. Deswegen wird im Rahmen der vorliegenden Erfindung eine Lösung bevorzugt, bei der die Sperrvorrichtung als Bolzenverriegelungssystem ausgebildet ist, das sich durch eine einfache und daher besonders kostengünstige und wenig störanfällige Lösung darstellt.The locking device of the telescopic boom according to the invention can be formed by one or more hydraulic cylinder-piston systems or, for example, also by one or more threaded spindle drives, which are each arranged on the inside of the two sections of the bendable telescopic section. This allows a stepless adjustment of the angle between the two sections. However, this is generally not necessary. Therefore, a solution is preferred in the context of the present invention in which the Locking device is designed as a bolt locking system, which is a simple and therefore particularly inexpensive and less prone to failure solution.
Hierzu wird in der Sperrvorrichtung mindestens ein Sperrbolzen, insbesondere einFor this purpose, at least one locking pin, in particular a
Paar Sperrbolzen vorgesehen, die bei koaxialer Ausrichtung der Längsachsen der Teilstücke des abwinkelbaren Teleskopschusses zur Erzielung einer Verriegelung dieser koaxialen Ausrichtung jeweils in zueinander koaxiale Bohrungen einer Sperrgabel, die mit dem einen Teilstück verbunden ist, und einer Sperrlasche, die mit dem anderen Teilstück verbunden ist, einführbar und unter Aufhebung derA pair of locking bolts are provided which, in the case of coaxial alignment of the longitudinal axes of the sections of the bendable telescopic section, to achieve locking of this coaxial alignment in each case in mutually coaxial bores of a locking fork which is connected to one section and a locking tab which is connected to the other section. importable and repealing the
Verriegelung aus den Bohrungen herausziehbar sind. Der Durchmesser der koaxialen Bohrungen entspricht dabei dem Durchmesser der Sperrbolzen. Auf diese Weise kann ein absolut sicherer Normalbetrieb des abwinkelbaren Teleskopschusses gewährleistet werden, bei dem die beiden Teilstücke also nicht gegeneinander abgewinkelt werden. Zur Fixierung einer abgewinkelten Stellung der beiden Teilstücke weist dieLatch can be pulled out of the holes. The diameter of the coaxial bores corresponds to the diameter of the locking bolts. In this way, absolutely safe normal operation of the bendable telescopic section can be guaranteed, in which the two sections are not angled against each other. To fix an angled position of the two sections, the
Sperrvorrichtung vorzugsweise eine Haltelasche auf, die durch Haltebolzen jeweils mit einer Haltegabel verbunden ist, wobei die Haltegabeln ihrerseits jeweils innen mit einem der beiden Teilstücke des abwinkelbaren Teleskopschusses fest verbunden sind. Zweckmäßigerweise wird die Haltelasche mit einem Langloch entlang ihrer Längsachse versehen, dessen Durchmesser (Breite) dem Durchmesser derLocking device preferably has a retaining tab, which is each connected to a retaining fork by retaining bolts, the retaining forks in turn being firmly connected on the inside to one of the two sections of the bendable telescopic section. The holding tab is expediently provided with an elongated hole along its longitudinal axis, the diameter (width) of which corresponds to the diameter of the
Haltebolzen entspricht, so dass diese relativ durch das Langloch gleiten können. Die axiale Länge dieses Langlochs ist dabei so ausgelegt, dass die beiden Haltebolzen in der abgewinkelten Stellung der beiden Teilstücke in den beiden Endbereichen des Langlochs an den jeweiligen halbzylindrischen Innenflächen liegen, so dass eine Anschlagstellung gegeben ist. Beim Strecken der beiden Teilstücke aus der abgewinkelten Stellung in die nicht abgewinkelte koaxiale Stellung können die beiden Haltebolzen ungehindert innerhalb des Langlochs gleiten, so dass die Streckung ohne einen Ausbau der Haltebolzen möglich ist. Selbstverständlich ist es hierbei nicht möglich, Zwischenstellungen der Abwinkelung zu fixieren. Wenn dies erforderlich sein sollte, können aber beispielsweise Haltelaschen mit unterschiedlicher Länge desHolding bolt corresponds so that they can slide relatively through the slot. The axial length of this elongated hole is designed such that the two retaining bolts in the angled position of the two sections lie in the two end regions of the elongated hole on the respective semi-cylindrical inner surfaces, so that a stop position is given. When the two sections are stretched from the angled position into the non-angled coaxial position, the two retaining bolts can slide freely within the elongated hole, so that the stretching is possible without removing the retaining bolts. Of course, it is not possible to fix intermediate positions of the bend. If this should be necessary, for example, retaining tabs with different lengths of the
Langlochs eingesetzt werden. Grundsätzlich wäre es auch möglich, in der Haltelasche mehrere in axialer Richtung voneinander beabstandete Bohrungen vorzusehen, in die jeweils bei entsprechender Winkelstellung die Haltebolzen eingesetzt werden. Dies würde aber einen unerwünschten Montageaufwand erfordern. Selbstverständlich ist es auch möglich, mehr als eine Kombination aus Haltelasche, Haltegabel und Haltebolzen einzusetzen. Die Verwendung einer einzelnen derartigen Kombination ist jedoch völlig ausreichend.Elongated holes are used. In principle, it would also be possible to provide a plurality of bores spaced apart in the axial direction in the retaining tab, into which the retaining bolts are inserted in each case with a corresponding angular position. However, this would require an undesirable assembly effort. Of course, it is also possible to use more than a combination of a retaining bracket, retaining fork and retaining bolt use. However, the use of a single such combination is entirely sufficient.
In einer bevorzugten Ausführungsform sieht die Erfindung vor, dass die Sperrbolzen jeweils an einem Bolzenträger befestigt sind, der parallel zu den Achsen derIn a preferred embodiment, the invention provides that the locking bolts are each fastened to a bolt carrier which is parallel to the axes of the
Bohrungen in der Sperrgabel und der Sperrlasche verfahrbar ist. Das Verfahren der Bolzenträger kann bevorzugt mittels eines Gewindespindeltriebs erfolgen. Der Antrieb für die Bewegung der Bolzenträger kann hydraulischer, pneumatischer, elektromotorischer oder auch elektromagnetischer Art sein. Bevorzugt wird jedoch wegen der besonders einfachen, störungsarmen und sowohl hinsichtlich desBores in the locking fork and the locking tab can be moved. The bolt carrier can preferably be moved by means of a threaded spindle drive. The drive for the movement of the bolt carrier can be hydraulic, pneumatic, electromotive or even electromagnetic. However, is preferred because of the particularly simple, low-interference and both in terms of
Bauaufwandes als auch der Bedienung wenig aufwendigen Ausführung ein Antrieb eines Gewindespindeltriebs für die Bolzenträger mittels einer Handkurbel. Um möglichst wenig Bauraum im Hinblick auf ein NichtÜberschreiten der Außenkontur des Hohlprofils des abwinkelbaren Teleskopschusses zu erfordern, kann eine solche Handkurbel abnehmbar gestaltet sein. Bevorzugt weist die Handkurbel jedoch eineConstruction effort as well as the operation, which is not very expensive, a drive of a threaded spindle drive for the bolt carrier by means of a hand crank. In order to require as little installation space as possible with a view to not exceeding the outer contour of the hollow profile of the bendable telescopic section, such a hand crank can be designed to be removable. However, the hand crank preferably has one
Antriebsachse auf, die in einer entsprechenden Hohlwelle des Gewindespindeltriebs axial verschieblich und drehfest in dieser geführt ist. Dadurch lässt sich diese Handkurbel zur Bedienung aus dem Inneren des Hohlprofils des Teleskopschusses durch eine entsprechende Öffnung in dessen Seitenwand herausziehen und in Arbeitsstellung bringen. Besonders empfehlenswert ist es darüber hinaus, diese Handkurbel mit einem anklappbaren Handgriff auszustatten.Drive axis, which is axially displaceable and rotatably guided in a corresponding hollow shaft of the threaded spindle drive. As a result, this hand crank can be pulled out of the interior of the hollow section of the telescopic section through a corresponding opening in its side wall and brought into the working position. It is also particularly advisable to equip this hand crank with a foldable handle.
Nachfolgend wird die Erfindung anhand des in den Figuren dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:The invention is explained in more detail below on the basis of the exemplary embodiment illustrated in the figures. Show it:
Fig. 1 einen erfindungsgemäßen Teleskopausleger in einer vollständig einteleskopierten Stellung und in einer Stellung mit austeleskopiertem abgewinkelten innersten Teleskopschuss,1 shows a telescopic boom according to the invention in a fully retracted position and in a position with telescoped angled innermost telescopic section,
Fig. 2 eine Abknickstelle bei koaxialer Ausrichtung der Teilstücke des abwinkelbaren Teleskopschusses,2 shows a kink with coaxial alignment of the sections of the bendable telescopic section,
Fig. 3 eine Draufsicht auf die Abknickstelle,3 is a plan view of the kink,
Fig. 4 die Abknickstelle bei abgewinkelten Teilstücken des Teleskopschusses, Fig. 5 einen axialen Querschnitt gemäß Linie A - A in Fig. 2,4 the kink point with angled sections of the telescopic section, 5 shows an axial cross section along line A - A in FIG. 2,
Fig. 6 einen axialen Querschnitt gemäß Linie C - C in Fig. 4 undFig. 6 is an axial cross section along line C - C in Fig. 4 and
Fig. 7 einen Schnitt gemäß Linie B - B in Fig. 5.7 shows a section along line BB in FIG. 5.
In Fig. 1 ist ein erfindungsgemäßer Teleskopausleger im axialen Längsschnitt in zwei Stellungen dargestellt. In der oberen Darstellung sind sämtliche aus einem Grundkasten 1 des Teleskopauslegers herausteleskopierbaren TeleskopschüsseIn Fig. 1, a telescopic boom according to the invention is shown in axial longitudinal section in two positions. In the illustration above, all telescopic sections that can be telescoped out of a basic box 1 of the telescopic boom are
4 - 10 vollständig in den Grundkasten 1 eingefahren. Diese Stellung entspricht der Transportstellung des Teleskopauslegers. In der unteren Darstellung von Fig. 1 ist allein der innerste Teleskopschuss 4 mittels der hydraulischen Teleskopiereinrichtung 12 aus dem Grundkasten 1 bzw. aus dem nächstgrößeren Teleskopschuss 5 ausgefahren, so dass die Abknickstelle 32 zwischen den beiden Teilstücken 4a, 4b des abwinkelbaren Teleskopschusses 4 freiliegt, also nicht mehr durch den Teleskopschuss 5 eingeschlossen ist. Auf die konstruktive Gestaltung der Abknickstelle 32 wird weiter unten näher eingegangen. Der Grundkasten ist an seinem unteren (rechten) Ende mit einem Drehgelenk 2 versehen, mit dem der eriϊndungsgemäße Teleskopausleger schwenkbar um eine horizontale Drehachse auf der Oberkonstruktion eines Fahrzeugskrans befestigt werden kann. An der in Arbeitsstellung als Unterseite anzusehenden Längsseite des Grundkastens 1 ist ein weiteres Drehgelenk 2 angeordnet, das ebenfalls eine horizontale Drehachse aufweist und zum Anschluss eines hydraulischen Wippzylinders dient, mit dem der Teleskopausleger die für die jeweils zu bewältigende Aufgabe erforderliche4 - 10 fully retracted into basic box 1. This position corresponds to the transport position of the telescopic boom. In the lower representation of FIG. 1, only the innermost telescopic section 4 is extended from the basic box 1 or from the next larger telescopic section 5 by means of the hydraulic telescopic device 12, so that the kink 32 is exposed between the two sections 4a, 4b of the angled telescopic section 4, is therefore no longer enclosed by the telescopic section 5. The structural design of the kink 32 will be discussed in more detail below. The basic box is provided at its lower (right) end with a swivel joint 2, with which the telescopic boom according to the invention can be fastened pivotably about a horizontal axis of rotation on the superstructure of a mobile crane. On the longitudinal side of the base box 1, which is to be seen as the underside in the working position, a further swivel joint 2 is arranged, which also has a horizontal axis of rotation and is used to connect a hydraulic luffing cylinder with which the telescopic boom can perform the tasks required for each task
Schrägstellung erreicht und unter Belastung hält.Tilt reached and holds under load.
Aus den weiteren Figuren 2 bis 7 geht die Konstruktion und Funktionsweise der Abknickstelle 32 des erfindungsgemäßen Teleskopauslegers im einzelnen hervor. In . Figur 2 ist die Abknickstelle als Seitenansicht in einer teleskopierbaren Stellung dargestellt, bei der die beiden Teilstücke 4a, 4b des abwinkelbaren Teleskopschusses 4 in koaxialer Stellung zueinander ausgerichtet und in dieser Stellung gegeneinander fixiert sind. Hierzu ist auf der Innenseite des Hohlprofils der beiden Teilstücke 4a, 4b ein Scharnier angeordnet, das, wie insbesondere aus Figur 5 hervorgeht, zwei Gelenkbolzen 13a, 13b sowie zwei Gelenklaschen 14a, 14b und zwei Gelenkgabeln 15a, 15b aufweist. Die Gelenklaschen 14a, 14b sind jeweils in den von den zueinander parallelen Blechteilen der Gelenkgabeln 15a, 15b gebildeten Zwischenraum eingeschoben und jeweils beide mit koaxialen Bohrungen versehen, deren Durchmesser dem Durchmesser des jeweiligen Gelenkbolzens 13a, 13b entspricht. Die Gelenkbolzen sind in diese Bohrungen eingeschoben und axial fixiert, so dass als dauerhaft vorhandenes Schanier ein Drehgelenk entsteht. Um die beiden Teilstücke 4a, 4b in ihrer koaxialen Ausrichtung zueinander fixieren zu können, sind auf der Innenseite des Hohlprofils in dessen oberem Teil als Sperrvorrichtung konstruktive Vorkehrungen getroffen, die dem Scharnier an der unteren Seite entsprechen. Diese bestehen jeweils aus einer Sperrgabel 18a, 18b, einer in diese Sperrgabeln 18a, 18b eingeführten Sperrlasche 17a, 17b, wobei die Sperrgabeln 18a, 18b und die Sperrlaschen 17a, 17b mit koaxialen Bohrungen versehen sind, und jeweils einem in diese Bohrungen einführbaren Sperrbolzen 16a, 16b, dessen Außendurchmesser dem Bohrungsdurchmesser entspricht. In Figur 3 und in Figur 5 sind die Sperrbolzen 16a, 16b in der Verriegeluπgsstellung eingezeichnet. Unter diesen Bedingungen verhält sich der innerste Teleskopschuss 4 wie ein herkömmlicher einteiliger Teleskopschuss, ist also ein- und austeleskopierbar. Die Sperrbolzen 16a, 16b sind jeweils mittels einer Schraubverbindung stirnseitig am oberen Ende eines Bolzenträgers 23a, 23b befestigt, der an seinem unteren Ende eine parallel zur Längsachse des Sperrbolzens 16a, 16b verlaufende Gewindebohrung aufweist (Fig. 5). Beide Bolzenträger 23a, 23b sind parallel so zueinander angeordnet, dass die beiden Gewindebohrungen koaxial ausgerichtet sind. Durch die Gewindebohrungen ist eine Verstellwelle 24 geführt, die zwei den Gewindebohrungen entsprechende Gewindeabschnitte 25a, 25b aufweist. Die beiden Gewindeabschnitte 25a, 25b haben wie auch die beiden Gewindebohrungen zueinander entgegengesetzte Steigungen. Bei Drehung derThe construction and functioning of the kink 32 of the telescopic boom according to the invention can be seen in detail from the further FIGS. 2 to 7. In . Figure 2 shows the kink as a side view in a telescopic position, in which the two sections 4a, 4b of the bendable telescopic section 4 are aligned in a coaxial position and are fixed in this position against each other. For this purpose, a hinge is arranged on the inside of the hollow profile of the two sections 4a, 4b, which, as can be seen in particular from FIG. 5, has two hinge pins 13a, 13b and two hinge plates 14a, 14b and two hinge forks 15a, 15b. The joint plates 14a, 14b are each inserted into the space formed by the mutually parallel sheet metal parts of the joint forks 15a, 15b and both are provided with coaxial bores, the diameter of which corresponds to the diameter of the respective joint bolt 13a, 13b. The hinge pins are inserted into these holes and axially fixed, so that a hinge is created as a permanent hinge. In order to be able to fix the two sections 4a, 4b in their coaxial alignment to one another, on the inside of the hollow profile in its upper part, structural precautions have been taken as a locking device which correspond to the hinge on the lower side. These each consist of a locking fork 18a, 18b, a locking tab 17a, 17b inserted into these locking forks 18a, 18b, the locking forks 18a, 18b and the locking tabs 17a, 17b being provided with coaxial bores, and a locking bolt 16a which can be inserted into these bores , 16b, the outer diameter of which corresponds to the bore diameter. In Figure 3 and in Figure 5, the locking pin 16a, 16b are drawn in the locking position. Under these conditions, the innermost telescopic section 4 behaves like a conventional one-piece telescopic section, so it can be telescoped in and out. The locking bolts 16a, 16b are each fastened at the end face by means of a screw connection to the upper end of a bolt carrier 23a, 23b, which has a threaded bore running at its lower end parallel to the longitudinal axis of the locking bolt 16a, 16b (FIG. 5). Both bolt carriers 23a, 23b are arranged parallel to one another in such a way that the two threaded bores are aligned coaxially. An adjusting shaft 24 is guided through the threaded bores and has two threaded sections 25a, 25b corresponding to the threaded bores. Like the two threaded bores, the two threaded sections 25a, 25b have pitches which are opposite to one another. When the
Verstellwelle 24 werden daher die beiden Bolzenträger 23a, 23b je nach Drehrichtung entweder aufeinander zu- oder voneinander wegbewegt. Auf diese Weise lassen sich die Sperrbolzen 16a, 16b aus den Bohrungen der Sperrlaschen 17a, 17b und Sperrgabeln 18a, 18b je nach Bedarf herausfahren oder in diese hineinfahren. Damit sich die Bolzenträger 23a, 23b nicht mit der Verstellwelle 24 mitdrehen können, sind sie in Langlöcherns 27a, 27b (Fig. 5 und Fig. 7) drehfest aber längsverschiebbar geführt. Die Verstellwelle 24 ist innerhalb des Teilstücks 4a des Teleskopschusses 4 drehbar und axial unverschieblich gelagert. An ihrem linken Ende ist die Verstellwelle 24 als Hohlwelle gestaltet und mit einem Langioch 30 versehen, das sich parallel zur Längsachse der Verstellwelle 24 erstreckt. In den Hohlwellenteil der Verstellwelle 24 ist die Antriebsachse 28 der Handkurbel 26 einführbar. An ihrem rechten Ende weist die Antriebsachse 28 einen radial abstehenden Mitnehmerstift 29 auf, der durch das Langloch 30 hindurchragt. Auf diese Weise bildet der Mitnehmerstift 29 einen Anschlag für das Herausziehen der Antriebsachse 28 aus dem Hohlwellenteil der Verstellwelle 24. Gleichzeitig bewirkt dieser Mitnehmerstift 30 eine drehfeste Verbindung zwischen der Antriebsachse 28 und der Verstellwelle 24. Man erkennt in Figur 5 in der linken Seitenwand des Hohlprofils des Teilstücks 4a eine Wandöffnung, die der Ausdehnung der Handkurbel 26 entspricht. Da der Hohlwellenteil 24 eine der axialen Länge der Antriebsachse 28 entsprechende Länge besitzt, kann auf diese Weise die Handkurbel 26 in das Hohlprofil vollständig hineingeschoben werden, wie dies aus Figur 6 hervorgeht. Der Handgriff der Handkurbel 26 ist vorteilhaft anklappbar, so dass im eingeklappten Zustand keine störenden Teile die Außenkontur des Hohlprofils überragen.Adjustment shaft 24, therefore, the two bolt carriers 23a, 23b are either moved towards or away from one another, depending on the direction of rotation. In this way, the locking bolts 16a, 16b can be moved out of or into the bores of the locking tabs 17a, 17b and locking forks 18a, 18b as required. So that the bolt carriers 23a, 23b cannot rotate with the adjusting shaft 24, they are guided in slots 27a, 27b (FIGS. 5 and 7) in a rotationally fixed but longitudinally displaceable manner. The adjusting shaft 24 is rotatably mounted within the section 4a of the telescopic section 4 and axially immovable. At its left end, the adjusting shaft 24 is designed as a hollow shaft and is provided with an elongated hole 30 which extends parallel to the longitudinal axis of the adjusting shaft 24. In the hollow shaft part of the adjusting shaft 24 the drive axis 28 of the hand crank 26 can be inserted. At its right end, the drive axle 28 has a radially projecting driver pin 29 which projects through the elongated hole 30. In this way, the driving pin 29 forms a stop for pulling the drive shaft 28 out of the hollow shaft part of the adjusting shaft 24. At the same time, this driving pin 30 creates a rotationally fixed connection between the driving shaft 28 and the adjusting shaft 24. One can see in FIG. 5 in the left side wall of the hollow profile of section 4a has a wall opening which corresponds to the extension of the hand crank 26. Since the hollow shaft part 24 has a length corresponding to the axial length of the drive axis 28, the hand crank 26 can be pushed completely into the hollow profile in this way, as can be seen from FIG. 6. The handle of the crank handle 26 can advantageously be folded up, so that no disruptive parts protrude beyond the outer contour of the hollow profile in the folded state.
Um die beiden Teilstücke 4a, 4b in der Abknickstelle 32 gegeneinander abwickeln zu können, muss die Verriegelung durch die Sperrbolzen 16a, 16b durch eine entsprechende Betätigung der Verstellwelle 24 aufgehoben werden, die Sperrbolzen 16a, 16b also aus den zugeordneten Bohrungen in der Sperrgabel 18a, 18b und der Sperrlasche 17a, 17b herausgefahren werden. Selbstverständlich ist es möglich, dass der Sperrbolzen 16a, 16b jeweils noch in die Bohrung des jeweiligen innenliegendenIn order to be able to unwind the two sections 4a, 4b against each other in the kink 32, the locking by the locking bolts 16a, 16b must be released by a corresponding actuation of the adjusting shaft 24, that is, the locking bolts 16a, 16b from the assigned bores in the locking fork 18a, 18b and the locking tab 17a, 17b are moved out. Of course, it is possible that the locking pin 16a, 16b each still in the bore of the respective inner
Teils der Sperrkabel 18a, 18b hineinragt, wie dies aus Figur 6 hervorgeht, die wie Figur 4 die entriegelte Stellung zeigt. Die Sperrlasche 17a, 17b ist jeweils in der abgewinkelten Stellung der beiden Teilstücke 4a, 4b aus der zugeordneten Sperrgabel 18a, 18b herausgeschwenkt. Um die beiden Teilstücke 4a, 4b in der jeweils gewünschten abgewinkelten Stellung im Sinne eines Anschlags gegeneinander zu fixieren, ist im oberen Teil des Hohlprofils des Teleskopschusses 4 eine entsprechende Haltevorrichtung vorgesehen, die verhindert, dass sich unter der Einwirkung der zu hebenden Last oder des Eigengewichts des abgewinkelten Teilstücks 4a der Winkel zwischen den beiden Teilstücken 4a, 4b über einen vorgegebenen Wert hinaus verändern kann. Diese Haltevorrichtung ist in der Mitte zwischen den beidenPart of the blocking cable 18a, 18b protrudes, as can be seen from FIG. 6, which, like FIG. 4, shows the unlocked position. The locking tab 17a, 17b is pivoted out of the associated locking fork 18a, 18b in the angled position of the two sections 4a, 4b. In order to fix the two sections 4a, 4b in the respectively desired angled position in the sense of a stop against each other, a corresponding holding device is provided in the upper part of the hollow profile of the telescopic section 4, which prevents the load to be lifted or its own weight from acting of the angled section 4a, the angle between the two sections 4a, 4b can change beyond a predetermined value. This holding device is in the middle between the two
Sperrgabeln 18a, 18b angeordnet und weist zwei Haltegabeln 21 a, 21 b auf, die jeweils an einem der beiden Teilstücke 4a, 4b befestigt sind. Zwischen den Haltegabeln 21 a 21 b ist eine Haltelasche 20 positioniert, die mit einem Langloch 22 versehen ist, welches sich in Richtung der Längsachse der Haltelasche 20 erstreckt. Die beiden Haltegabeln 21 a, 21 b sind jeweils mit Durchgangsbohrungen versehen, in die jeweils ein Haltebolzen 19a, 19b axial unverschieblich eingeführt ist. Der Durchmesser bzw. die Breite des Langlochs 22 entsprechen dem Durchmesser der Haltebolzen 19a, 19b, so dass die Haltelasche 20, deren Langloch 22 eine Länge aufweist, die wesentlich größer ist als der Achsabstand der beiden Haltebolzen 19a, 19b (Fig. 3), gleitbar von den Haltebolzen 19a, 19b gehalten wird. Daher können, wie dies in Fig. 4 dargestellt ist, die beiden Teilstücke 4a, 4b um die gemeinsame Achse der Gelenkbolzen 13a, 13b gegeneinander verschwenkt werden und werden in dieser Schwenkbewegung erst durch Erreichen der Endanschlagstellung der beiden Haltebolzen 19a, 19b im Langloch 22 begrenzt. Aus den Figuren 2 und 3 geht weiterhin die Anordnung eines Sensors 31 hervor, mit dem überwacht werden kann, ob die Handkurbel 26 ordnungsgemäß eingeschoben ist und das Einteieskopieren des Teleskopschusses 4 nicht behindert.Locking forks 18a, 18b arranged and has two holding forks 21 a, 21 b, which are each attached to one of the two sections 4a, 4b. A holding bracket 20 is positioned between the holding forks 21 a 21 b and is provided with an elongated hole 22 which extends in the direction of the longitudinal axis of the holding bracket 20. The two holding forks 21 a, 21 b are each provided with through holes, in each a retaining bolt 19a, 19b is axially immovably inserted. The diameter or the width of the elongated hole 22 correspond to the diameter of the retaining bolts 19a, 19b, so that the retaining tab 20, the elongated hole 22 of which has a length which is substantially greater than the center distance of the two retaining bolts 19a, 19b (FIG. 3), is slidably supported by the retaining bolts 19a, 19b. Therefore, as shown in Fig. 4, the two sections 4a, 4b can be pivoted against each other about the common axis of the hinge pins 13a, 13b and are limited in this pivoting movement only when the end stop position of the two retaining bolts 19a, 19b in the slot 22 , FIGS. 2 and 3 also show the arrangement of a sensor 31 with which it can be monitored whether the hand crank 26 is properly inserted and does not hinder the copying of the telescopic section 4.
Mit der erfindungemäßen Ausgestaltung wird ein Teleskopausleger geschaffen, dessen sämtliche Teleskopschüsse mittels einer gemeinsamen Teleskopiervorrichtung ausgefahren werden können und deren Länge einschließlich des Länge des Grundkastens gegenüber einem herkömmlichen Teleskopausleger keinerlei Verkürzungen hinnehmen muss, da die Abknickstelle des teleskopierbaren Teleskopschusses vollständig in den jeweils den abknickbaren Teleskopschuss umgebenden Teleskopschuss einfahrbar ist. Die hierfür erforderlichen konstruktivenWith the configuration according to the invention, a telescopic boom is created, the telescopic sections of which can be extended by means of a common telescopic device and whose length, including the length of the basic box, does not have to accept any shortenings compared to a conventional telescopic boom, since the kinking point of the telescopic telescopic section completely surrounds the respective telescopic section that can be bent Telescopic shot is retractable. The design required for this
Vorkehrungen können rein mechanischer Art sein und sind daher vergleichsweise kostengünstig und in jedem Fall außerordentlich betriebssicher. Da für die Betätigung der Entriegelung der Abknickstelle nur ein sehr geringer Aufwand erforderlich ist und das Abknicken nur vergleichsweise selten notwendig ist, kann diese Betätigung ohne weiteres von Hand erfolgen. Um den abgeknickten Teleskopschuss wieder in eine koaxiale Ausrichtung seiner beiden Teiistücke zu bringen, braucht die Spitze des Auslegers lediglich auf einer Unterlage (z.B. Erdboden) aufgelegt und weiter soweit abgesenkt werden, bis die Bohrungen der Sperrlaschen und Sperrgabeln miteinander fluchten und die Sperrbolzen eingefahren werden können. Danach kann auch das letzte Stück des Teleskopauslegers vollständig einteleskopiert werden. Bezugszeichenliste:Precautions can be of a purely mechanical nature and are therefore comparatively inexpensive and in any case extremely reliable. Since only very little effort is required to actuate the unlocking of the kinking point and the kinking is comparatively rarely necessary, this actuation can easily be done by hand. In order to bring the bent telescopic section back into a coaxial alignment of its two pieces, the boom tip only needs to be placed on a base (e.g. ground) and lowered further until the holes in the locking tabs and locking forks are aligned and the locking bolts can be retracted , Then the last piece of the telescopic boom can be fully telescoped. LIST OF REFERENCE NUMBERS
1 Grundkasten 2 Drehgelenk1 basic box 2 swivel joint
3 Drehgelenk .3 swivel.
4 innerster Teleskopschuss4 innermost telescopic shot
4a, b Teilstücke des innersten Teleskopschusses4a, b sections of the innermost telescopic shot
5 - 11 Teleskopschüsse5 - 11 telescopic shots
12 Teleskopiereinrichtung12 telescopic device
13a, b Gelenkbolzen13a, b hinge pin
14a, b Gelenklasche14a, b hinged bracket
15a, b Gelenkgabel15a, b articulated fork
16a, b Sperrbolzen16a, b locking bolts
17a, b Sperrlasche17a, b locking tab
18a, b Sperrgabel18a, b locking fork
19a, b Haltebolzen19a, b retaining bolts
20 Haltelasche20 retaining tab
21a, b Haltegabel21a, b holding fork
22 Langloch22 slot
23a, b Bolzenträger23a, b bolt carrier
24 Verstellwelle24 adjustment shaft
25a, b Gewindeabschnitt25a, b threaded section
26 Handkurbel26 hand crank
27a, b Langloch27a, b slot
28 Antriebsachse 9 Mitnehmerstift28 drive axle 9 drive pin
30 Langloch30 slot
31 Sensor 2 Äbknickstelle 31 Sensor 2 break point

Claims

Patentansprüche: claims:
1. Teleskopausleger für einen Fahrzeugkran, mit einem Grundkasten (1), der an seinem unteren Ende in einem horizontalen Drehgelenk (2) an einer1. Telescopic boom for a mobile crane, with a basic box (1) which at its lower end in a horizontal swivel joint (2) on a
5 Oberkonstruktion des Fahrzeugkrans lagerbar ist und ein weiteres horizontales5 superstructure of the mobile crane is storable and another horizontal
Drehgelenk (3) besitzt, an dem ein mit der Oberkonstruktion verbindbarer Wippzylinder zur Schrägstellung des Teleskopauslegers anlenkbar ist, und mit mehreren jeweils ineinander oder im Grundkasten (1) geführten Teleskopschüssen (4 - 11), die alle mittels einer unmittelbar an den jeweiligen o Teleskopschuss ankoppelbaren Teleskopiereinrichtung (12) teleskopierbar sind und in der teleskopierten Stellung gegeneinander verriegelbar sind, wobei einer der teleskopierbaren Teleskopschüsse (4 - 11 ) als abwinkelbarer Teleskopschuss (4) in seiner axialen Länge aus zwei Teilstücken (4 a, b) zusammengesetzt ist und die beiden Teilstücke (4 a, b) mittels eines Scharniers 5 zueinander verschwenkbar sind und wobei die Teilstücke (4a, b) mittels einerHas a swivel joint (3) on which a luffing cylinder that can be connected to the upper structure can be articulated to tilt the telescopic boom, and with a plurality of telescopic sections (4 - 11), each of which is guided one inside the other or in the basic box (1), all of which are connected directly to the respective telescopic section connectable telescopic device (12) are telescopic and can be locked against each other in the telescopic position, one of the telescopic telescopic sections (4 - 11) as an angled telescopic section (4) being composed in its axial length of two sections (4 a, b) and the two Parts (4 a, b) can be pivoted relative to one another by means of a hinge 5, and the parts (4a, b) can be pivoted using a
Sperrvorrichtung hinsichtlich ihrer Längsachsen in einer koaxialen Ausrichtung und in mindestens einer zueinander abgewinkelten Stellung miteinander verriegelbar sind, dadurch gekennzeichnet, 0 dass das Scharnier und die Sperrvorrichtung des abwinkelbarenLocking device can be locked with respect to their longitudinal axes in a coaxial orientation and in at least one angled position, characterized in that the hinge and the locking device of the bendable
.Teleskopschusses (4) innerhalb der Innenkontur des nächstgrößeren Teleskopschusses (5) liegen..Telescope shot (4) lie within the inner contour of the next largest telescopic shot (5).
2. Teleskopausleger nach Anspruch 1 , 5 dadurch gekennzeichnet, dass der abwinkelbare Teleskopschuss (4) der innerste der Teleskopschüsse (4 -1 1 ) ist.2. Telescopic boom according to claim 1, 5 characterized in that the bendable telescopic section (4) is the innermost of the telescopic sections (4 -1 1).
3. Teleskopausleger nach einem der Ansprüche 1 - 2, 0 dadurch gekennzeichnet,. dass das Scharnier innen an der Unterseite des abwinkelbaren Teleskopschusses (4) angeordnet ist.3. Telescopic boom according to one of claims 1 - 2, 0, characterized. that the hinge is arranged on the inside on the underside of the bendable telescopic section (4).
4. Teleskopausleger nach einem der Ansprüche 1 - 3, dadurch gekennzeichnet, dass das Scharnier mindestens einen, insbesondere ein Paar Gelenkbolzen (13 a, b) aufweist, die jeweils mit einer Gelenklasche (14 a, b), welche mit dem einen Teilstück (4 a) verbunden ist, und einer Gelenkgabel (15 a, b), welche mit dem anderen Teilstück (4 b) verbunden ist, zusammenwirken.4. Telescopic boom according to one of claims 1-3, characterized in that the hinge has at least one, in particular a pair of hinge pins (13 a, b), each with a hinge plate (14 a, b), which is connected to one section (4 a), and an articulated fork (15 a, b ), which is connected to the other section (4 b), cooperate.
5. Teleskopausleger nach einem der Ansprüche 1 - 4, dadurch gekennzeichnet, dass die Sperrvorrichtung innen an der Oberseite des abwinkelbaren Teleskopschusses (4) angeordnet ist.5. Telescopic boom according to one of claims 1-4, characterized in that the locking device is arranged inside on the top of the bendable telescopic section (4).
6. Teleskopausleger nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, dass die Sperrvorrichtung durch einen oder mehrere hydraulische Zylinder- Kolben-Systeme gebildet ist, die auf der Innenseite der beiden Teilstücke (4 a, b) angelenkt sind.6. Telescopic boom according to one of claims 1-5, characterized in that the locking device is formed by one or more hydraulic cylinder-piston systems which are articulated on the inside of the two sections (4 a, b).
7. Teleskopausleger nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, dass die Sperrvorrichtung durch einen oder mehrere Gewindespindeltriebe gebildet ist, die auf der Innenseite der beiden Teilstücke (14 a, b) angelenkt sind.7. Telescopic boom according to one of claims 1-5, characterized in that the locking device is formed by one or more threaded spindle drives which are articulated on the inside of the two sections (14 a, b).
8. Teleskopausleger nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, dass die Sperrvorrichtung als Bolzenverriegelungssystem ausgebildet ist.8. Telescopic boom according to one of claims 1-5, characterized in that the locking device is designed as a bolt locking system.
9. Teleskopausleger nach Anspruch 8, dadurch gekennzeichnet, dass in der Sperrvorrichtung mindestens ein Sperrbolzeπ, insbesondere ein Paar Sperrbolzen (16 a, b) vorgesehen sind, die bei koaxialer Ausrichtung der9. Telescopic boom according to claim 8, characterized in that in the locking device at least one Sperrbolzeπ, in particular a pair of locking bolts (16 a, b) are provided, the coaxial alignment of the
Längsachsen der Teilstücke (4 a, b) zur Erzielung einer Verriegelung dieser Ausrichtung jeweils in koaxiale Bohrungen einer Sperrgabel (18 a, b), die mit dem einen Teilstück (4 a) verbunden ist, und einer Sperrlasche (17 a, b), die mit dem anderen Teilstück (4 b) verbunden ist, einführbar und unter Aufhebung der Verriegelung aus den Bohrungen herausziehbar sind. Longitudinal axes of the sections (4 a, b) to achieve a locking of this alignment in each case in coaxial bores of a locking fork (18 a, b), which is connected to one section (4 a), and a locking tab (17 a, b), which is connected to the other section (4 b), can be inserted and pulled out of the bores while releasing the lock.
10. Teleskopausleger nach einem der Ansprüche 8 - 9, dadurch gekennzeichnet, dass die Sperrvorrichtung zur Fixierung einer abgewinkelten Stellung der beiden Teilstücke (4 a, b) eine Haltelasche (20) aufweist, die durch Haltebolzen10. Telescopic boom according to one of claims 8 - 9, characterized in that the locking device for fixing an angled position of the two sections (4 a, b) has a retaining tab (20) by means of retaining bolts
(19 a, b) jeweils mit einer Haltegabel (21 a, b) verbunden ist, die innen jeweils an einem der beiden Teilstücke (14 a, b) befestigt ist.(19 a, b) is each connected to a holding fork (21 a, b) which is fastened on the inside to one of the two sections (14 a, b).
11. Teleskopausleger nach Anspruch 10, dadurch gekennzeichnet, dass die Haltelasche (20) ein Langloch (31) aufweist, in dem die Haltebolzen (19 a, b) gleitbar sind.11. Telescopic boom according to claim 10, characterized in that the retaining tab (20) has an elongated hole (31) in which the retaining bolts (19 a, b) are slidable.
12. Teleskopausleger nach einem der Ansprüche 8 - 11 , dadurch gekennzeichnet, dass die Sperrbolzen (16 a, b) jeweils an einem Bolzenträger (23 a, b) befestigt sind, der paraWei zu den Achsen der Bohrungen in den Sperrgabeln (18 a, b) und Sperrlaschen (17 a, b) verfahrbar ist.12. Telescopic boom according to one of claims 8 - 11, characterized in that the locking bolts (16 a, b) are each fastened to a bolt carrier (23 a, b) which is paraWei to the axes of the holes in the locking forks (18 a, b) and locking tabs (17 a, b) can be moved.
13. Teleskopausleger nach Anspruch 12, dadurch gekennzeichnet, dass die Bolzenträger (23 a, b) mittels eines Gewindespindeltriebs (24, 25 a, b) verfahrbar sind.13. Telescopic boom according to claim 12, characterized in that the bolt carrier (23 a, b) can be moved by means of a threaded spindle drive (24, 25 a, b).
14. Teleskopausleger nach einem der Ansprüche 12 - 13, dadurch gekennzeichnet, dass die Bolzenträger (23 a, b) mittels eines hydraulischen, pneumatischen, elektromotorischen oder elektromagnetischen Antriebs verfahrbar sind.14. Telescopic boom according to one of claims 12 - 13, characterized in that the bolt carrier (23 a, b) can be moved by means of a hydraulic, pneumatic, electromotive or electromagnetic drive.
15. Teleskopausleger nach Anspruch 13, dadurch gekennzeichnet, dass der Gewindespindeltrieb (24, 25 a, b) mittels einer Handkurbel (26) drehbar ist. 15. Telescopic boom according to claim 13, characterized in that the threaded spindle drive (24, 25 a, b) is rotatable by means of a hand crank (26).
16. Teleskopausleger nach Anspruch 15, dadurch gekennzeichnet, dass die Handkurbel (26) eine Antriebsachse (28) aufweist, die in einem entsprechenden Hohlwellenteil des Gewindespindeltriebs (Verstellwelle 24) axial verschieblich und drehfest geführt ist.16. Telescopic boom according to claim 15, characterized in that the hand crank (26) has a drive axis (28) which is guided axially displaceably and non-rotatably in a corresponding hollow shaft part of the threaded spindle drive (adjusting shaft 24).
17. Teleskopausleger nach einem der Ansprüche 15 - 16, dadurch gekennzeichnet, dass die Handkurbel (26) einen anklappbaren Handgriff aufweist. 17. Telescopic boom according to one of claims 15 - 16, characterized in that the hand crank (26) has a foldable handle.
EP02716594A 2001-03-28 2002-02-13 Telescopic boom for a vehicle crane Expired - Lifetime EP1373120B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10116245 2001-03-28
DE10116245A DE10116245A1 (en) 2001-03-28 2001-03-28 Telescopic boom for a mobile crane
PCT/DE2002/000559 WO2002076874A1 (en) 2001-03-28 2002-02-13 Telescopic boom for a vehicle crane

Publications (2)

Publication Number Publication Date
EP1373120A1 true EP1373120A1 (en) 2004-01-02
EP1373120B1 EP1373120B1 (en) 2005-09-28

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EP02716594A Expired - Lifetime EP1373120B1 (en) 2001-03-28 2002-02-13 Telescopic boom for a vehicle crane

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EP (1) EP1373120B1 (en)
JP (1) JP2004521046A (en)
AT (1) ATE305437T1 (en)
DE (2) DE10116245A1 (en)
WO (1) WO2002076874A1 (en)

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DE102009022262A1 (en) 2009-05-22 2010-11-25 Terex Demag Gmbh Angular adjustment of a boom system

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US3842985A (en) * 1972-12-15 1974-10-22 Harnischfeger Corp Means for extending and retracting crane boom section
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CN108529454A (en) * 2017-03-02 2018-09-14 马尼托瓦克起重机有限责任公司 Arm system of connections for arm storage

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Publication number Publication date
WO2002076874A1 (en) 2002-10-03
ATE305437T1 (en) 2005-10-15
JP2004521046A (en) 2004-07-15
DE50204397D1 (en) 2006-02-09
EP1373120B1 (en) 2005-09-28
DE10116245A1 (en) 2002-10-17

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