EP0593390B1 - Mobile crane - Google Patents

Mobile crane Download PDF

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Publication number
EP0593390B1
EP0593390B1 EP19930810181 EP93810181A EP0593390B1 EP 0593390 B1 EP0593390 B1 EP 0593390B1 EP 19930810181 EP19930810181 EP 19930810181 EP 93810181 A EP93810181 A EP 93810181A EP 0593390 B1 EP0593390 B1 EP 0593390B1
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EP
European Patent Office
Prior art keywords
crane
boom
base
mobile crane
chassis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19930810181
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German (de)
French (fr)
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EP0593390A1 (en
EP0593390B2 (en
Inventor
Werner Häfliger
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Werner Häfliger
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Priority to CH3112/92 priority Critical
Priority to CH311292A priority patent/CH686365A5/en
Application filed by Werner Häfliger filed Critical Werner Häfliger
Publication of EP0593390A1 publication Critical patent/EP0593390A1/en
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    • 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
    • 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
    • B66C23/18Cranes 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 specially adapted for use in particular purposes
    • B66C23/36Cranes 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 specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/42Cranes 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 specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes with jibs of adjustable configuration, e.g. foldable

Description

  • The invention relates to a mobile crane that has a crane vehicle, a superstructure rotatably mounted on it, an articulated boom that is pivotally mounted thereon by means of a drive, preferably a luffing cylinder, and at least one separate boom that can be connected to the latter, with on the front side of the Upper boom-mounted boom articulation means are provided for attaching the separate boom.
  • Such a mobile crane is fundamentally limited in terms of its dimensions and thus the possible load moments and lifting heights of the loads. It must generally be no more than 4 m, no wider than 3 m and its length is generally limited to 7 to 8 axes. In today's modern road construction with roundabouts and other constrictions, it is advantageous if the mobile crane is not designed with the maximum possible dimensions, so that it can be maneuvered and moved forward even in densely populated areas. Limits are also set for its total weight with maximum axle loads of 12 tons, which must not be exceeded. On the other hand, with these mobile cranes ever larger loads and constantly higher strokes should be achieved. It has therefore gone over to providing mobile cranes with separate brackets; where the boom is carried on a semitrailer or a specially designed transport vehicle, for example. This means that these jibs can be built with even larger dimensions than those which are arranged directly on the mobile crane.
  • In such a generic mobile crane (US Pat. No. 3,968,884), the boom provided on the superstructure is designed as a telescopic boom, to which a separate boom designed as a lattice mast can be fastened. For this purpose, the telescopic boom has corresponding articulation means on its front side. Regarding this mobile crane, it should be noted that although it can be used to lift loads to very high heights after installing the separate jib, the weight is limited because the outermost, weakest link with the telescopic boom fully extended with the additional lattice boom is approximately in the middle. In addition, in the case of mobile cranes in which the telescopic boom is arranged directly on the crane vehicle, there are the disadvantages already explained above, from which it can be seen that their dimensions and axle loads cannot be increased arbitrarily.
  • In another known mobile crane according to DE-A1 31 39 596, this essentially has a crane chassis. a crane superstructure mounted on a slewing ring and a separate telescopic boom. When installing the latter on the crane superstructure, the crane vehicle and a jib transporter must first be coupled backwards, which results in a space-limited assembly of the jib, because the space conditions do not always allow two extremely long vehicles to be placed one behind the other. By telescoping the separate boom, it is pushed into the crane superstructure via a highly luffing slide. After automatic bolting on the one hand and release of a luffing cylinder on the other hand, the boom can be lifted with the crane supported. The counterweight can then be placed by the crane itself over the motor of the chassis. By swiveling the Kanoberwagen, this mobile crane is in its actual operating state. Although high load capacities and very long boom lengths can be achieved with it, the disadvantage here is that the upgrading or assembly of the same - as explained in detail above - is very complex and therefore too time-consuming and therefore no longer economical. In addition, the boom must be loaded on a specially designed transporter and an auxiliary crane must be provided to support the crane vehicle, which places the massive and heavy slabs used to support it next to the crane vehicle. This results in high acquisition and consequently high operating costs for this system. Another disadvantage of this mobile crane is that it is only functional for a hydraulic boom. This considerably limits the area in which it is used.
  • Furthermore, in a known mobile crane according to the document NL-A 296 991, a jib part which is articulated on the superstructure is provided, but which is not arranged so that it can be rocked by means of a drive, for example a luffing cylinder, but this jib part is merely in a specific position via a plug pin Mechanism held. A unit with a cable guide and a crane hook attached to it is then mounted on this jib part, with which certain restricted auxiliary crane work can be carried out, above all the assembly of the lattice boom cranes, which can subsequently be upgraded to this jib part. The disadvantage here is that this unit must be mounted on or removed from the jib part using a separate auxiliary crane before the lattice boom crane is upgraded to this jib part. As a result, it takes a relatively long time for this mobile crane to be fully upgraded or dismantled, which has a corresponding effect on the upgrade time, which according to today standards must be carried out extremely quickly, otherwise using such a mobile crane will be too expensive.
  • In contrast, the object of the present invention is to further develop a generic mobile crane in such a way that it can achieve the highest load capacities and maximum jib lengths with the simplest and fastest assembly and / or that it allows universal use.
  • According to the invention, the object is achieved in that the boom arranged on the superstructure (12, 62) is designed as a structurally one-piece base piece (20, 70) by means of which crane work can be carried out independently, and at least one roller (26) for a cable guide on its front (25) is rotatably mounted for receiving a crane hook (27); or that the boom arranged on the superstructure (48) is designed as a structurally one-piece base piece (50) by means of which kruan work can be carried out independently, for this purpose a guy stand (30) is pivotably arranged on the front of the base piece (50), which is in one position can be positioned in which it forms an extending arm for the base piece (50) and at the tip of which at least one roller (37) is provided for a cable guide for receiving a crane hook (35).
  • With the mobile crane according to the invention, there is the great advantage that, on the one hand, with the structurally one-piece base piece permanently mounted on the superstructure, it can be carried out practically without assembly work or support of auxiliary cranes or similar crane work, be it in relation to lifting smaller loads or be it for Upgrading the mobile crane. like piling up the ballast and of course also for attaching the separate boom. On the other hand, the fully equipped mobile crane can lift or lower the highest possible loads to maximum heights, while the dimensions of the crane itself can be kept smaller compared to all the known mobile cranes designed for the heaviest loads. However, the maximum dimensions specified by the road law are used for a mobile crane according to the invention. In this way, load torques and strokes can be achieved that exceed the performance of the prior art by a lot, because with a maximum dimensioned construction of the base piece and the separate boom, absolute top performances can be achieved. In addition, this mobile crane according to the invention provides a universal possibility of use that has never been achieved compared to existing cranes. This is particularly evident from the fact that it can be used absolutely economically for smaller as well as for the heaviest loads without overly complex assemblies.
  • The structurally one-piece base piece advantageously extends over the entire length of the crane vehicle and, in addition, its front should protrude beyond the crane vehicle in any rotational position of the superstructure. As a result, the prerequisites for independent work of the base piece are optimally given and, in addition, with this dimensioning of the base piece, the separate bracket can be installed very easily and quickly.
  • For the above-mentioned crane work with the structurally one-piece base piece, this has at least one rotatably mounted roller for a cable guide for receiving a crane hook in its front end region or a guy stand that can be used for a Maxilift is pivotably arranged on its front side and can be positioned in one position , in which it forms an extension arm for the base piece and at the tip of which at least one roller is provided for a cable guide for receiving a crane hook and thus for performing crane work.
  • Furthermore, the base piece should be able to be rocked to the crane vehicle by an angle slightly negative with respect to the horizontal plane, preferably up to 150. As a result, the separate boom, which is brought up on a semitrailer, for example, can be attached directly to the front of the base piece.
  • The base piece advantageously consists of a lattice construction, which on the one hand makes the mobile crane unequaled and on the other hand the crane vehicle can be made more solid. At least one rocking cylinder pivoting this base piece is held at one end on the superstructure and at the other end within the base piece. As a result, the base piece can in turn be pivoted by a slightly negative angle with respect to the horizontal and assembly with the separate bracket can be facilitated.
  • Further advantages and exemplary embodiments of the invention are explained in more detail below with reference to the drawing. It shows:
    • Fig. 1 is a schematic side view of a mobile crane according to the invention with a separate telescopic boom mounted on it.
    • Fig. 2 is a schematic side view of the mobile crane having a guy stand according to Fig. 1, in which crane work is carried out with the guy stand.
    • 3 shows a side view of a schematically illustrated mobile crane in the basic equipment and
    • 4 shows a side view of another variant of a mobile crane according to the invention shown in principle.
  • Fig. 1 shows an almost fully equipped, in the starting position mobile crane, which consists essentially of a crane vehicle 11, an upper structure 48 rotatably mounted thereon about a vertical axis, a cab 47 located on the latter for operating the crane, one on the upper structure 48 consists of a base piece 50 which can be rocked up about a horizontal axis and consists of a separate arm 40 fastened to its front side. One or preferably two rocking cylinders 51 acting in parallel are articulated at one end to the superstructure 48 and at the other end within the base piece 50, with which or with the latter the latter can be pivoted up or down. In the example shown, a ballast carrier 52 serving as a counterweight with ballast plates 53 stacked thereon is also attached to the rear of the superstructure 48. The front of the crane vehicle 11 has a driver's cab 55, seven wheel axles 38 and a so-called star support 56, which is composed on both sides of two support legs 44 that can be folded out individually to the axis of rotation of the superstructure 48. These are shown in the unfolded state, in which the mobile crane with its wheels is lifted off the ground and is thus in the position to carry out crane work. This described crane vehicle 11 consists of known elements and is therefore not shown and circumscribed in every detail.
  • Compared to all the known ones, the mobile crane has a novel base piece 50, which is characterized by the following features: Above all, this base piece 50 is structurally provided in one piece and is designed in such a way that auxiliary crane work, in particular, can already be carried out independently with it, and also on the front side Linkage means 33 and 34 are provided for fastening the separate arm 40. The latter is constructed with significantly larger dimensions than one that is arranged directly on the superstructure, in which the total height and width of the mobile crane must not be exceeded and its total weight is also limited. This gives the mobile crane according to the present invention a large plus, as compared to a significantly larger separate telescopic boom 40 compared to a boom placed directly on the mobile crane, together with the base piece provided with maximum dimensions 50, absolute peak loads and strokes can be achieved. Because the base piece 50 consists of a lattice construction, the total weight of this mobile crane can also be reduced and the crane vehicle 11 and the superstructure 48 can be made more solid. In order to achieve maximum dimensions of the base piece 50, this extends approximately over the entire length of the crane vehicle 11 and, in addition, its articulation on the superstructure 48 is provided in the end region of the crane vehicle 11, if possible. A main winch 42 is also integrated in the separate telescopic boom 40, which thereby contributes to its quick assembly. Bolt locks distributed at the four corners of the base piece 50 serve as articulation means 33 and 34 for the telescopic boom 40. These are of course hydraulic and can be operated from the cabin, and six or more such articulation means could also be provided. Otherwise, it is also shown how the crane vehicle 11 stands with its support legs 44 of the star support on the ground supports 45. The support legs 44 can be extended horizontally and thus adjusted in length depending on the terrain.
  • The mobile crane according to FIG. 2 corresponds to that according to FIG. 1, but the separate boom 40 is not installed. On the upper front of the base piece 50, a guy stand 30 provided for a Maxilift is pivotally mounted about a vertical plane and additionally serves to carry out crane work with only the base piece 50. This guy stand 30 is fixed thereon or can be removed by means of an axis 31 and held by a support element 32 approximately parallel and positioned as an extended arm to the base piece 50. Again, a rope (not shown in more detail) is led from a winch 49 in the base piece 50 to a roller 34 rotatable at the tip of the guy stand 30 and holds a crane hook 35 there. This embodiment has the advantage that smaller loads can be transported with it. This fundamentally increases the flexibility of the mobile crane, be it to upgrade it or to transport smaller loads.
  • The mobile crane is upgraded so that the guy bracket 30 is first supported in the position provided as an extending arm by means of the support element 32 which can be mounted on the structurally one-piece base piece 50, then the cable guide and the crane hook 35 are brought into the operating position. The guy stand 30 can be rotated about the axis 31 into the mentioned position by means of a rocking cylinder contained in the base piece 50 or some other type of drive. Subsequently, the base piece 50 is swung up and through this the ballast 52, 53 brought up on a separate truck is placed on the front of the crane vehicle 11, so that this ballast can be attached to the rear of the superstructure 48, the latter being used for this purpose is rotated by 180 relative to the position shown in FIG. 2. As a result, the support bases 45 are placed by the mobile crane itself in the required space and then the star support 45 is used to pivot the lowering of the individual support legs 44 to support the mobile crane. Next, the separate boom 40 is then connected to the base piece 50. The telescopic boom 40, which is brought up, for example, on a semitrailer tractor, can either be lifted directly onto the base piece 50 or first of all from the latter into a defined mounting position. In any case, this mobile crane according to the invention can be provided very quickly and therefore extremely economically in the upgrade position necessary for effective work.
  • The ballast, which can weigh a maximum of 50 tons, is normally loaded by the boom 50 itself onto the crane vehicle 11 in a predetermined position at the front. In the case of the crane vehicle 11 with star support, it would also be conceivable for this ballast to be ballasted onto the support legs 44 instead of onto the crane vehicle 11 and then attached to the rear of the superstructure 48 as described above. The ballast would be placed on two advantageously fully extended support legs 44 and it could then be placed either on one of the two crane sides or on the rear two support legs.
  • The mobile crane shown in FIG. 3 essentially consists of a crane vehicle 10, an uppercarriage 12 rotatably mounted thereon about a vertical axis, a cabin 14 located on the latter for operating the crane, and a base piece 20 which can be rocked upward about a horizontal axis on the uppercarriage 12 and from one or preferably two rocker cylinders 13, with which the latter can be pivoted up or down. In the example shown, a ballast carrier 16 serving as counterweight is in turn attached to the superstructure 12 with ballast plates 16 ′ stacked thereon. The front of the crane vehicle 10 has a driver's cab 17, six wheel axles 19, and a so-called star support 15, which is composed on both sides of two support legs which are symmetrical and individually foldable with respect to the axis of rotation of the superstructure 12. These are shown here in the folded state, in which the mobile crane can be driven around. This described mobile crane also consists of known elements and it is therefore not every detail that is described and described by him. In any case, lifting winches 24 are integrated in it, from which a rope 25 is guided over rollers 26 on its lower front side and on which a crane hook 27 for lifting and lowering loads hangs. The base piece 20 is dimensioned and arranged on the superstructure 12 in such a way that its front side projects beyond the crane vehicle 10 in each rotational position and can thus take up loads located at any point with the crane hook 27 next to the crane vehicle 10. In addition, it extends approximately over the entire length of the crane vehicle 10 and is rotatably mounted in the end region of the latter. Thus, with this mobile crane according to the invention, even small crane jobs that would otherwise be done with a smaller-sized mobile crane can be carried out quickly and expediently, and on the other hand, similar to that according to FIG. 1, it can be fully upgraded in an extremely short time, so that it can be in the state with the separate boom can take absolutely heavy loads and achieve peak strokes. For the rest, three paired articulation means 23 are provided on the front of the base piece 20 above its height, which allow separate brackets with different dimensions to be attached. Together, these features result in the unique universality of this mobile crane.
  • The mobile crane according to FIG. 4 is again constructed in principle the same as that explained in more detail above, and therefore only the different components are described in more detail below. This mobile crane is composed of a five-axle crane vehicle 61, a superstructure 62 which can be rotated thereon and a cabin 63, and a different type of base piece 70. The latter is box-shaped and is drawn at a slightly negative angle to the horizontal plane or to the longitudinal design of the crane vehicle 61. In this pivoting position, it can be coupled with its front side 71 to the rear end side 60 'of the separate telescopic boom 60 carried on a semitrailer 65 without any problems and without special aids having to be provided on the semitrailer. This connection is achieved so that first the upper articulation means 73 are bolted, then the base piece 70 is lifted up slightly and then the lower articulation means 74 engage with one another and are also bolted.
  • The base piece 70 according to FIG. 4 can have an extension part which extends in its longitudinal axis and is displaceable therein.
  • In the variants described above, the separate booms are only shown as telescopic booms. Such feeders with lattice construction could be used just as sensibly in one or more parts or also in one-piece design and closed construction. In the context of this mobile crane according to the invention in the sense of a modular system mes include several different separate booms or multiple base pieces and depending on the application, one or the other boom or Base piece are used.
  • The mobile or mobile crane according to the invention is also excellently suited to the method mentioned in technical language when assembling the separate boom 60, such as, for example, according to FIG. This boom 60 is supported at one end on a semi-trailer and articulated at its other end to the base piece 70 via the articulation means 72 and / or 73. This allows them to be moved on a construction site and brought into the position required for crane work and upgraded.

Claims (11)

1. Mobile crane, having a crane travel gear (10, 61), an upper carrying chassis (12, 62) pivot-mounted on said travel gear, a boom that can be luffed on said upper carrying chassis by a drive, preferably a hoisting cylinder (13), and at least one separate boom (40, 60) that can be connected to said boom, whereby attachment means (23, 72, 73) are provided on the front side of the boom pivot-mounted on the carrying chassis (12, 62) for attaching the separate boom (40, 60), characterised in that the boom which can be luffed on the upper carrying chassis (12, 62) is provided structurally as a one-piece base section (20, 70), that is designed in such a manner that with it alone crane work can be performed, for that purpose at it's front end region is pivot-mounted at least one roller (26) for a cable guide (25) to receive a crane hook (27).
2. Mobile crane, having a crane travel gear (11), an upper carrying chassis (48) pivot-mounted on said travel gear, a boom that can be luffed on said upper carrying chassis by a drive, preferably a hoisting cylinder (51), and at least one separate boom (40, 60) that can be connected to said boom, whereby attachment means (33, 34) are provided on the front side of the boom pivot-mounted on the carrying chassis (48) for attaching the separate boom (40, 60), characterised in that the boom which can be luffed on the upper carrying chassis (48) is provided structurally as a one-piece base section (50), that is designed in such a manner that with it alone crane work can be performed, for that purpose a luffing jib (30) is pivot-mounted on the front side of the base section (50); said luffing jib can be positioned in a position in which it forms an elongating arm for the base section (50) and its tip has at least one roller (37) for a cable guide to receive a crane hook (35).
3. Mobile crane, according to claim 1 or 2, characterised in that the base section (50, 20, 70) extends virtually over the entire length of the crane travel gear (11, 10, 61).
4. Mobile crane, according to claim 1, 2 or 3, characterised in that the base section (50, 70) is mounted on the upper carrying chassis (48, 12, 62) in such a manner, that it's front side extends beyond said crane travel gear (11, 10, 61) in all relative positions of rotation of said carrying chassis (48, 12, 62) and in that said base section in the initial position is provided to the end region of the travel gear (11, 10, 61
5. Mobile crane, according to any one of the claims 1 to 4, characterised in that the boom (40, 60) to be transported separately and the base section (50, 70) are arranged in such a manner prior to assembly, that they can be fastened together virtually without any auxiliary means.
6. Mobile crane, according to claim 5, characterised in that the base section (50, 20, 70) with respect to the crane travel gear can be level-luffed at a slightly negative angle, preferably up to 15 , relative to the horizontal plane.
7. Mobile crane, according to any one of the preceding claims, characterised in that the base section (50, 20) consists of a lattice construction, and at least one hoisting cylinder (51, 13) is assigned to said base section; the one end of said hoisting cylinder being hinged to the upper carrying chassis (48, 12) and the other end within the base section (59, 20).
8. Mobile crane, according to any one of the preceding claims, characterised in that for the respective cable guide (25) at least one main winch (42) mounted in or on the separate boom (40) is integrated, whereas in the base section (50, 20) at least one auxiliary lifting winch (24) is integrated.
9. Mobile crane, according to any one of the preceding claims, characterised in that the front side of the base section (20, 50, 70) is designed in such a manner that a different kind of boom can be mounted, for example a boom with lattice construction or a telescopic boom, which can also exhibit different dimensions.
10. Mobile crane, according to any one of the preceding claims, characterised in that the mobile crane includes alternatively several separate booms and/or several base sections in the sense of a modular system.
11. Mobile crane, according to any one of the preceding claims, characterised in that the ballast (52, 53) is deposited on two of the support legs (44) of the star support (56).
EP19930810181 1992-10-06 1993-03-12 Mobile crane Expired - Lifetime EP0593390B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH3112/92 1992-10-06
CH311292A CH686365A5 (en) 1992-10-06 1992-10-06 Mobile crane.

Publications (3)

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EP0593390A1 EP0593390A1 (en) 1994-04-20
EP0593390B1 true EP0593390B1 (en) 1994-12-14
EP0593390B2 EP0593390B2 (en) 1997-11-05

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US (1) US5642821A (en)
EP (1) EP0593390B2 (en)
JP (1) JPH06206692A (en)
CH (1) CH686365A5 (en)
DE (1) DE59300041D1 (en)
ES (1) ES2070021T5 (en)

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Also Published As

Publication number Publication date
EP0593390B2 (en) 1997-11-05
EP0593390A1 (en) 1994-04-20
JPH06206692A (en) 1994-07-26
ES2070021T3 (en) 1995-05-16
CH686365A5 (en) 1996-03-15
US5642821A (en) 1997-07-01
ES2070021T5 (en) 1998-03-16
DE59300041D1 (en) 1995-01-26

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