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1. (WO1980000032) APPARATUS FOR TRANSLATING ROTARY MOVEMENT TO RECTILINEAR MOVEMENT
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1980/000032 International Application No.: PCT/SE1979/000127
Publication Date: 10.01.1980 International Filing Date: 05.06.1979
IPC:
F16H 25/24 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
H
GEARING
25
Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
18
for conveying or interconverting oscillating or reciprocating motions
20
Screw mechanisms
24
Elements essential to such mechanisms, e.g. screws, nuts
Applicants:
Inventors:
Priority Data:
780657405.06.1978SE
Title (EN) APPARATUS FOR TRANSLATING ROTARY MOVEMENT TO RECTILINEAR MOVEMENT
(FR) APPAREIL DE TRANSFORMATION D"UN MOUVEMENT ROTATIF EN UN MOUVEMENT LINEAIRE
Abstract:
(EN) Apparatus for translating rotary to linear motion using cylindrical means in the form of a shaft or cylinder with helical grooves, usually having a thread profile. For obtaining good efficiency and large gear ratio, i.e. small linear movement per revolution, the apparatus has been made up from an outer cylinder (1) with a rear transverse portion (5) and a forward outer opening (3) through which an inner cylinder (11) is unrotatably displaceable. The inner cylinder (11) has on its inside a helix groove (12) or thread, in which at least one profiled roller (30, 32, 40) with circular ridges (33) engages. The roller or rollers are eccentrically disposed at one end of a drive shaft (23), rotatably but axially undisplaceably mounted (8) in the outer cylinder (1) at its other end. When the shaft (23) rotates, the rollers (31, 32, 4O) roll or follow in the grooves (12) of the inner cylinder (11) and displace the inner cylinder in the outer cylinder.
(FR) Un appareil de transformation d"un mouvement rotatif en un mouvement lineaire comprend des moyens cylindriques en forme d"arbre ou cylindre ayant des rainures helicoidales, presentant un profil filete. Pour obtenir un bon rendement et un grand rapport d"engrenage, c"est-a-dire un petit deplacement lineaire par tour, l"appareil a ete realise a partir d"un cylindre externe (1) ayant une partie transversale arriere (5) et une ouverture externe avant (3) a travers laquelle un cylindre interne (11) se deplace de maniere non rotative. Le cylindre interne (11) possede a l"interieur une rainure helicoidale (12) ou filet, dans laquelle s"engage au moins un rouleau profile (30, 32, 40) ayant des aretes circulaires (33). Le rouleau ou les rouleaux sont disposes de facon excentree a une extremite d"un arbre d"entrainement (23), monte rotativement mais ne pouvant se deplacer axialement (8) dans le cylindre externe (1) a son autre extremite. Lorsque l"arbre (23) tourne, les rouleaux (31, 32, 40) roulent ou suivent les rainures (12) du cylindre interne (11) et deplacent celui-ci dans un cylindre externe.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
BRPI7908898EP0006082EP0018978US4337671DK38280