Screw drive method and apparatus

F - Mech Eng,Light,Heat,Weapons – 16 – H

Patent

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Details

F16H 25/24 (2006.01) B23Q 5/40 (2006.01) F16C 25/06 (2006.01)

Patent

CA 2324622

A method and apparatus for operating a screw drive apparatus. The apparatus (110) includes a threaded rod (111) having a helical thread (112), a nut (114) disposed about the threaded rod (111) and having a load-bearing channel aligned with and radially outward from the helical thread (112), and a plurality of balls (119) between the helical thread (112) and the load-bearing channel. The apparatus further includes a housing (124) with at least one support bearing (126) having an inner race (132) coupled to the nut (114) and an outer race (134) coupled to the housing (124) and rotatable relative to the inner race (132). A retaining member (150) is removably and adjustably coupled to the nut (114) to apply an adjustable force against the support bearing (126) in a direction generally parallel to a longitudinal axis of the threaded rod (111).

L'invention concerne un procédé et un système permettant de faire fonctionner un appareil d'entraînement par vis. Cet appareil (110) peut comprendre une tige filetée (111) présentant un filetage hélicoïdal (112), un écrou (114) placé autour de cette tige filetée (111) et pourvu d'un canal porteur aligné par rapport audit filetage hélicoïdal (112) et placé de manière radiale à l'extérieur de celui-ci, et plusieurs billes (119) disposées entre le filetage hélicoïdal (112) et le canal porteur. Cet appareil peut également comporter un carter (124) pourvu d'au moins un roulement support (126) dont la bague intérieure (132) est couplée audit écrou (114), et la bague extérieure (134) est couplée audit carter (124) de manière à pouvoir pivoter par rapport à ladite bague intérieure (132). Un élément de retenue (150) est en outre couplé de manière amovible et réglable à l'écrou (114), afin de pouvoir exercer une force ajustable sur ledit roulement support (126), dans un sens généralement parallèle à un axe longitudinal de la tige filetée (111).

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