Seal and scrapper assembly for ball bearing screws and the like

Details Seal and scrapper assembly for ball bearing screws and the like Seal and scrapper assembly for ball bearing screws and the like

F - Mech Eng,Light,Heat,Weapons

16

J

277/17

F16J 15/48 (2006.01) F16H 25/24 (2006.01) F16J 15/32 (2006.01)

Patent

CA 2005536

A seal and scraper assembly for a ball screw and nut actuator has a resilient seal ring for reception by the nut which includes a radially internal helical thread mating with the screw groove. The seal ring further has a radially compressible annular lip extending at an angle in an axially outboard direction from the outer periphery of the ring to engage and be radially compressed by the nut. A rigid, annular mount ring also has an internal thread received by the screw groove which has an axially inboard portion interfitting with the seal ring so as to permit relative axial movement of the seal ring and mount ring, while preventing relative rotation of the rings.

Ensemble de bague d'étanchéité et de segment racleur conçu pour un actionneur à vis et à écrou à billes. L'ensemble se compose d'une bague d'étanchéité élastique destinée à être insérée dans l'écrou doté d'un filetage hélicoïdal interne correspondant au fil de la vis. La bague d'étanchéité comprend en outre un bord radial compressible se prolongeant en angle dans une direction externe axiale à partir de la périphérie externe de la bague. Le bord radial est fait pour entrer en contact avec l'écrou et être radialement comprimé par ce dernier. Un anneau de fixation annulaire rigide possède également un filetage interne correspondant au fil de la vis, laquelle comprend une section interne axiale qui s'engage avec la bague d'étanchéité afin de permettre un mouvement axial relatif de la bague d'étanchéité et de l'anneau de fixation tout en empêchant la rotation relative de la bague et de l'anneau

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