| 摘要 |
<p>The invention relates to the mast-hydraulic cylinder construction (4, 5) of a two or multiple-stage forklift mast. The substantially vertical beams (4, 5) and cylinder liners (6) of the solid mast structure form an integrated structure (4, 5), in which the cylinder liners (6) consist of ducts integrated within the beams (4, 5), with the mass centre of the cross-section of the integrated structures being at the centre of the cylinder liner (6) or in its immediate vicinity so that the integrated structure (4, 5) can be manufactured by heat extrusion or cold drawing, and in that the integrated structure (4, 5) comprises a first protrusion (14), whose surface substantially transverse to the direction of movement of the forklift and facing the cylinder liner is a bearing surface (17) for a roller bearing (16), and a second protrusion (15) for providing a mass centre at the centre of the cylinder liner (6) or in its immediate vicinity, and a support surface (18, 19) substantially transverse to the direction of movement of the forklift and disposed on the second protrusion (15) or on the outer surface of the cylinder liner facing the first protrusion (14). The invention also relates to a method for producing an integrated structure (4, 5).</p> |
