EP1373120A1 - Fleche telescopique pour une grue automotrice - Google Patents
Fleche telescopique pour une grue automotriceInfo
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/702—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic with a jib extension boom
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs
Definitions
- the 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)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10116245 | 2001-03-28 | ||
DE10116245A DE10116245A1 (de) | 2001-03-28 | 2001-03-28 | Teleskopausleger für einen Fahrzeugkran |
PCT/DE2002/000559 WO2002076874A1 (fr) | 2001-03-28 | 2002-02-13 | Fleche telescopique pour une grue automotrice |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1373120A1 true EP1373120A1 (fr) | 2004-01-02 |
EP1373120B1 EP1373120B1 (fr) | 2005-09-28 |
Family
ID=7680009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02716594A Expired - Lifetime EP1373120B1 (fr) | 2001-03-28 | 2002-02-13 | Fleche telescopique pour une grue automotrice |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1373120B1 (fr) |
JP (1) | JP2004521046A (fr) |
AT (1) | ATE305437T1 (fr) |
DE (2) | DE10116245A1 (fr) |
WO (1) | WO2002076874A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108529454A (zh) * | 2017-03-02 | 2018-09-14 | 马尼托瓦克起重机有限责任公司 | 用于吊臂收纳的吊臂联接*** |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007007646B4 (de) * | 2007-02-13 | 2010-11-25 | Mielke, Julian | Teleskopierbarer Autokran in Turmkranfuktion mit Vorrichtung zum Ausschieben und Ausklappen von Segmenten |
DE202007012764U1 (de) | 2007-09-12 | 2009-02-12 | Liebherr-Werk Ehingen Gmbh | Auslegerkran, Hilfsausleger und Zwischenstück |
DE202008015659U1 (de) | 2008-11-26 | 2009-03-19 | Palfinger Ag | Kranspitze für einen Ladekran |
DE102009022262A1 (de) * | 2009-05-22 | 2010-11-25 | Terex Demag Gmbh | Winkelverstellung eines Auslegersystems |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2208625A1 (de) * | 1972-02-24 | 1973-10-11 | Krone Bernhard Gmbh Maschf | Ladekran fuer lastkraftwagen und lkwanhaenger |
US3842985A (en) * | 1972-12-15 | 1974-10-22 | Harnischfeger Corp | Means for extending and retracting crane boom section |
US4484686A (en) * | 1982-04-23 | 1984-11-27 | Kidde, Inc. | Multiple offset boom extension |
FR2691140B1 (fr) * | 1992-05-15 | 1998-03-06 | Commissariat Energie Atomique | Dispositif de levage par cable pour manipuler des charges lourdes a l'interieur d'une enceinte etanche blindee. |
EP0970914B1 (fr) * | 1998-07-07 | 2009-03-18 | Terex Demag GmbH | Grue mobile avec flèche télescopique |
-
2001
- 2001-03-28 DE DE10116245A patent/DE10116245A1/de not_active Ceased
-
2002
- 2002-02-13 DE DE50204397T patent/DE50204397D1/de not_active Expired - Lifetime
- 2002-02-13 EP EP02716594A patent/EP1373120B1/fr not_active Expired - Lifetime
- 2002-02-13 WO PCT/DE2002/000559 patent/WO2002076874A1/fr active IP Right Grant
- 2002-02-13 JP JP2002576142A patent/JP2004521046A/ja active Pending
- 2002-02-13 AT AT02716594T patent/ATE305437T1/de not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO02076874A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108529454A (zh) * | 2017-03-02 | 2018-09-14 | 马尼托瓦克起重机有限责任公司 | 用于吊臂收纳的吊臂联接*** |
Also Published As
Publication number | Publication date |
---|---|
WO2002076874A1 (fr) | 2002-10-03 |
ATE305437T1 (de) | 2005-10-15 |
EP1373120B1 (fr) | 2005-09-28 |
DE10116245A1 (de) | 2002-10-17 |
DE50204397D1 (de) | 2006-02-09 |
JP2004521046A (ja) | 2004-07-15 |
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