| 摘要 |
<p>The invention relates to a method of manufacturing a telescopic tube (1), which comprises an outer tube (2) and an inner tube (3) as well as guiding rings (6a, 6b) of a thickness which exceeds the difference between the inner radius of the outer tube (2) and the outer radius of the inner tube (3), for diametrical and axial guiding of the outer tube (2) and the inner tube (3) relative to each other. A first circumferential groove (7) is milled in the inner circumferential surface (4) of the outer tube (2) to a diameter corresponding to the sum of twice the thickness of the first guiding ring 6a and the outer diameter of the inner tube (3). A second circumferential groove (8) is milled in the outer circumferential surface (5) of the inner tube (3) to a diameter corresponding to the inner diameter of the outer tube (2) from which twice the thickness of the second guiding ring (6b) is subtracted. The circumferential grooves (7, 8) are provided with their respective guiding rings (6a, 6b), and the tubes (2, 3) are inserted into one another in a manner intended for telescopic tubes, such that the circumferential surfaces, separated from the respective tubes (2, 3), of the guiding rings come into abutment against the circumferential surfaces (4, 5) of the respective adjoining tubes. <IMAGE></p> |
