ADJUSTABLE TELESCOPIC MECHANISM Russian patent published in 2008 - IPC F16C3/02 F16L27/12 B66C23/687 E04H12/18 

FIELD: engine and pumps.

SUBSTANCE: invention relates to movable, length-adjustable shafts or those incorporating movable parts, in particular, telescopic composite parts with split joints, the shafts incorporating separate drives of the said movable parts included. The said adjustable telescopic mechanism includes an inner and outer concentric casings and lengthwise screw pairs made up of a screw and nut. The said casings are additionally coupled by circular rows of rolling-contact bearings, the screw pair nut being made integral with the inner casing. The screw of the said screw pair is linked, by its one end, via a muff and an angular ball bearing with the drive, the radial thrust bearing being arranged in the outer casing, and by its other end, it is linked with an additional radial thrust bearing in the inner casing. The nut of the said screw pair is interlinked with one of the rows of the said rolling-contact bearings. The inner casing is coupled with the intermediate muff that is, further on, coupled with the additional consecutively arranged inner casing with the screw pair nut built in the latter and radial-thrust bearing coupled with the aforesaid additional screw pair. The bearings of screw pair screws are fitted in the inner casing by means of elastic supports.

EFFECT: higher stability with decreasing self-weight deflection, better compactness, resonance stability, simplicity and interchangeability of parts, higher efficiency.

5 cl, 4 dwg