Vehicle crane with a boom that can be luffed by two luffing cylinders
AssigneeTadano Demag GmbH
InventorChristian Moritz Urban
Life of this patent
Estimating the term…
Abstract
A vehicle crane having a boom that can be luffed between a storage position and a working position within a vertical luffing plane by at least two luffing cylinders The luffing cylinders that lie opposite one another on the luffing plane, enclosing a spread angle between their longitudinal axes in the working position, and the luffing cylinders acting on the boom outside its ends. The longitudinal axis, projected onto the luffing plane, of one luffing cylinder and a vertical direction extending within the luffing plane enclose an angle of inclination there between when the boom is in the storage position to achieve a compact design, particularly when the boom is in the storage position.
Claims15
A vehicle crane comprising:
- a jib and precisely two luffing cylinders, wherein the jib is configured to be luffed via the two luffing cylinders within a vertical luffing plane between a storage position and an operating position;
- wherein the luffing cylinders lie opposite one another on the luffing plane and in the operating position form an angle of spread between longitudinal axes of the luffing cylinders, and
- wherein the luffing cylinders act upon the jib away from ends of the jib;
- wherein, when the jib is in the storage position, the longitudinal axis of a luffing cylinder projected onto the luffing plane and an upwards direction extending within the luffing plane form an angle of inclination therebetween;
- wherein the angle of inclination is from 80° to 100° when the jib is in the storage position and the angle of spread is from 2° to 30° when the jib is in the operating position;
- wherein the jib is a telescoping jib having a basic box and inner boxes that can telescope in and out;
- wherein the luffing cylinders act upon the basic box of the jib;
- and
- wherein the luffing cylinders act upon a region on the basic box which, as seen in the longitudinal direction of the basic box, is spaced apart at least 10% of the total length of the basic box in each case from an upper end and also a lower end of the basic box.
Dependencies are inferred from the claim text.