MOBILE CRANE AND METHOD FOR ANGLING A MAIN JIB EXTENSION RELATIVE TO A MAIN JIB OF A MOBILE CRANE
First Claim
1. A mobile crane comprising a main jib which is mounted in a luffable manner thereon and can be raised by means of a luffing cylinder, and comprising a main jib extension that is releasably connected to a main jib head of the main jib by upper and lower bolts, wherein the main jib extension, proceeding from a basic position after release of the upper or lower bolts, can be angled relative to the main jib about a luffing axis by means of an angling drive, wherein the angling drive engages a foot of the main jib extension, and a maximum angling angle is limited by an adjustable angling plate and the angling plate engages the foot of the main jib extension and the main jib head and wherein the angling drive is a component of an angling plate in the form of a combi-angling plate.
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Accused Products
Abstract
A mobile crane having a main jib that is mounted thereupon for luffing and that can be oriented by means of a luffing cylinder, and a main jib extension that is detachably connected to a main jib head of the main jib by means of upper and lower bolts, it being possible to angle the main jib extension about a luffing axis relative to the main jib proceeding from a base position following release of the upper or lower bolts and using an angle drive, the angle drive engaging with a foot of the main jib extension, a maximum angling angle being delimited by an adjustable angling plate, and the angling plate engaging with the foot of the main jib extension and the main jib head. The angle drive may be a component of an angling plate in the form of a combi-angling plate.
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Citations
22 Claims
- 1. A mobile crane comprising a main jib which is mounted in a luffable manner thereon and can be raised by means of a luffing cylinder, and comprising a main jib extension that is releasably connected to a main jib head of the main jib by upper and lower bolts, wherein the main jib extension, proceeding from a basic position after release of the upper or lower bolts, can be angled relative to the main jib about a luffing axis by means of an angling drive, wherein the angling drive engages a foot of the main jib extension, and a maximum angling angle is limited by an adjustable angling plate and the angling plate engages the foot of the main jib extension and the main jib head and wherein the angling drive is a component of an angling plate in the form of a combi-angling plate.
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10. (canceled)
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11. (canceled)
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19. A method for angling a main jib extension relative to a main jib of a mobile crane, wherein the main jib is mounted in a luffable manner on the mobile crane and can be raised by a luffing cylinder with the main jib extension being releasably connected to a main jib head of the main jib by upper and lower bolts, wherein an angling drive engages a foot of the main jib extension and a maximum angling angle is limited by an adjustable angling plate and the angling plate engages the foot of the main jib extension and the main jib head, said method comprising:
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raising the main jib extension from a basic position relative to the main jib about a luffing axis as far as until the upper or lower bolts are relieved using the angling drive, wherein the angling drive is a component of an angling plate in the form of a combi-angling plate; removing the upper or lower bolts; inserting at least one combi-angling plate between the main jib head and a top chord or bottom chord of the main jib extension, wherein said inserting may be previously performed; lowering the main jib extension using the angling drive for as long as until the maximum angular position is reached or a head of the main jib extension comes to rest on a ground; drivingly separating the angling drive from the combi-angling plate; and raising the main jib if the maximum angular position is not yet reached in order to angle the main jib extension until the desired angling angle is achieved. - View Dependent Claims (20, 21, 22)
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Specification