摘要:
The invention concerns a lattice boom crane, which is composed of at least two individual lattice boom cranes (1, 11), which each comprise a luffing lattice boom (4, 14), whose luffing angle is adjustable by a luffing mechanism (5, 15). The lattice booms (4, 14) of the individual lattice boom cranes (1, 11) are connected with each other and oriented in parallel and adjacent to each other and the luffing mechanisms (5, 15) of the lattice boom cranes (1, 11) are synchronously operated, such that the rigidly-connected lattice booms (4, 14) are synchronously luffable.
摘要:
The invention concerns a lattice boom crane, which is composed of at least two individual lattice boom cranes (1, 11), which each comprise a luffing lattice boom (4, 14), whose luffing angle is adjustable by a luffing mechanism (5, 15). The lattice booms (4, 14) of the individual lattice boom cranes (1, 11) are connected with each other and oriented in parallel and adjacent to each other and the luffing mechanisms (5, 15) of the lattice boom cranes (1, 11) are synchronously operated, such that the rigidly-connected lattice booms (4, 14) are synchronously luffable.
摘要:
The invention refers to a truck roller assembly (12) for a crawler chain comprising at least two spaced track roller portions (5, 5′) with running surfaces for running on the crawler chain (13), and a star-shaped element (6) for guiding the track roller assembly (12) on the crawler chain (13). The star-shaped element (6) is mounted freely rotatably between the at least two track roller portions (5, 5′), and it is provided with a plurality of teeth (6′, 6″, 6′″, 6″″, 6′″″). The teeth (6′, 6″, 6′″, 6″″, 6′″″) co-operate with the crawler chain (13) in such a way that on rolling over chain links (3) of the crawler chain (13) they engage into corresponding gaps (8) in the crawler chain (13). The teeth (6′, 6″, 6′″, 6″″, 6′″″) extend beyond the running surfaces of the at least two track roller portions (5, 5′) and between projections (7, 7′) of the crawler chain (13) such that it is ensured that the crawler chain (13) Is not displaced laterally relative to the track roller portions (5, 5′) and does not roll up on to the projections (7) of the crawler chain (13). In an alternative embodiment the star-shaped element is replaced by an idling roller (11).
摘要:
The invention proposes a hoisting-cable drive for a mobile crane, which hoisting-cable drive uses a single bottom-hook block (15) instead of a known double bottom-hook block. However, to prevent this single bottom-hook block (15) from tilting in the two cable lines (9, 10), for example due to possible variations in the elongation of the two cable drives, the hoisting-cable drive according to the invention comprises a kinematic force equilibrium device (17, 21), which can equalize such differences. To this effect, another embodiment of the hoisting-cable drive according to the invention uses a hoisting-cable load pickup (21) within each cable line arrangement so that the rotary speed of the winches (7, 8) can be varied, taking into account any load differences in the individual hoisting-cable lines (9, 10). Furthermore, the invention also proposes that the rotary speed of the winches (7, 8) be adjusted, taking into account the geometric winch states and crane states.
摘要:
The invention refers to a truck roller assembly (12) for a crawler chain comprising at least two spaced track roller portions (5, 5′) with running surfaces for running on the crawler chain (13), and a star-shaped element (6) for guiding the track roller assembly (12) on the crawler chain (13). The star-shaped element (6) is mounted freely rotatably between the at least two track roller portions (5, 5′), and it is provided with a plurality of teeth (6′, 6″, 6″′, 6″″, 6″″′). The teeth (6′, 6″, 6″′, 6″″, 6″″′) co-operate with the crawler chain (13) in such a way that on rolling over chain links (3) of the crawler chain (13) they engage into corresponding gaps (8) in the crawler chain (13). The teeth (6′, 6″, 6″′, 6″″, 6″″′) extend beyond the running surfaces of the at least two track roller portions (5, 5′) and between projections (7, 7′) of the crawler chain (13) such that it is ensured that the crawler chain (13) Is not displaced laterally relative to the track roller portions (5, 5′) and does not roll up on to the projections (7) of the crawler chain (13). In an alternative embodiment the star-shaped element is replaced by an idling roller (11).
摘要:
The invention proposes a hoisting-cable drive for a mobile crane, which hoisting-cable drive uses a single bottom-hook block (15) instead of a known double bottom-hook block. However, to prevent this single bottom-hook block (15) from tilting in the two cable lines (9, 10), for example due to possible variations in the elongation of the two cable drives, the hoisting-cable drive according to the invention comprises a kinematic force equilibrium device (17, 21), which can equalize such differences. To this effect, another embodiment of the hoisting-cable drive according to the invention uses a hoisting-cable load pickup (21) within each cable line arrangement so that the rotary speed of the winches (7, 8) can be varied, taking into account any load differences in the individual hoisting-cable lines (9, 10). Furthermore, the invention also proposes that the rotary speed of the winches (7, 8) be adjusted, taking into account the geometric winch states and crane states.
摘要:
The object of the invention is to reduce the amount of investment required for the usage-optimized configuration and installation of large cranes. This object is achieved by a large mobile crane having an undercarriage, a drive unit (16), a revolving superstructure (18), one or more control stations (17), at least two jibs (3), at least one counter-jib (4), at least two lifting arrangements (22) and counterweights arranged separately or on the basic structure, characterized in that the load-bearing parts of the crane (3, 4, 20) and the mobility-specific parts (5, 6, 7) are of modular design and can be supplemented by exchangeable and/or supplementary parts, wherein the structural units (modules) used essentially correspond, or are similar, to existing standard-crane components, and an increase in load-bearing capacity can be achieved by arranging a number of these in the large crane.
摘要:
A large mobile crane includes a revolving superstructure, a main boom hinged to the superstructure, and a derrick boom hinged to the superstructure. A modular counterweight system includes a traveling counterweight and a non-traveling counterweight connected to a crossbeam suspended from the distal end of the derrick boom so that the non-traveling counterweight is activated before the traveling counterweight.
摘要:
A mobile crane includes an undercarriage with a middle section and two parallel crawler carriages; a superstructure on which a boom is mounted, the superstructure being connected to the undercarriage by a rotary joint; two longitudinal outriggers connected to the undercarriage and extending in the longitudinal direction between the crawler carriages; and two transverse outriggers connected to the undercarriage and extending outside the crawler carriages. One of the longitudinal outriggers has an end with a transverse beam supported by spaced apart outrigger cylinders which provide an extended tipping edge to further stabilize the crane.
摘要:
The invention relates to a crawler crane comprising two crawler supports (9) with rotating crawlers (8). Both crawler supports (9) are connected by a transversal bridge (10). A superstructure (3) of the crawler crane comprises at least one crane jib that can pivot about a vertical axis and is connected to the transversal bridge (10). A pivotable articulation connects the transversal bridge (19) in a pivotable manner to the crane superstructure (3). At least one of the crawler supports (9) is connected to the transversal bridge (10) by means of a double link (11). A lower link (12) of the double link (11) is articulated on the crawler support (9) by means of a crawler support lower pivotable axis (13) and on the transversal bridge (10) by means of a transversal bridge lower pivotable axis (14). An upper link (15) of the double link (11) is articulated on the crawler support (9) by means of a crawler support upper pivotable axis (16) and on the transversal bridge (10) by means of a transversal bridge upper pivotable axis (17). A drive (20), in particular motorised drive, is used to pivot at least one of the two links (12, 15) about the pivotable axis (13) associated therewith, the result being a level-controllable crawler crane, in which the expenditure for adjusting a base-work position is reduced.