Thermochemical/mechanical brake and clutch unit

H - Electricity – 02 – N

Patent

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Details

H02N 10/00 (2006.01) B60T 17/00 (2006.01) F03G 7/06 (2006.01) F16D 28/00 (2006.01) F16D 43/25 (2006.01) F16D 65/14 (2006.01) F16D 65/16 (2006.01) F16D 65/18 (2006.01)

Patent

CA 2255043

An actuator (A) includes a body (10) in which a plurality of chambers or bores (34) are defined. The bores are interconnected at an inner end by an elongated passage (30). A heater element (32) extends along the elongated passage. The elongated passage and the inner portion of each chamber or bore are filled with a polymeric material which expands and flows on heating, preferably undergoing a solid to liquid phase change. Extensible members (12), such as pistons, diaphragms, bellows, or the like, are mounted in the bores or wells. When the heater heats the polymeric material causing it to expand and flow, the extensible elements (12) extend under high force with limited travel. In one embodiment, the extension of the extensible members moves a thrust bearing (B) causing frictionally engagable plates (18, 22) of a friction member assembly (C) to engage.

L'invention porte sur un actionneur (A) comportant un corps (10) où sont usinées plusieurs chambres ou alésages (34). Les alésages sont interconnectés côté intérieur par un couloir allongé (30). Un élément chauffant (32) s'étend le long dudit couloir. Ledit couloir et la partie intérieure de chacune des chambres sont remplis d'un polymère qui se dilate et se fluidifie à la chaleur en passant de préférence d'une phase solide à une phase liquide. Des éléments expansibles (12) tels que des pistons, des membranes, des soufflets sont montés dans les alésages ou les puits. Lorsque l'élément chauffant chauffe le polymère en le dilatant et le fluidifiant, les éléments expansibles (12) sont poussés vers l'extérieur avec une grande force sur une course limitée. Dans l'une des réalisations, ce déplacement vers l'extérieur agit sur une butée (B), ce qui met en contact tribologique les plateaux de friction (18, 22) d'un système de friction (C).

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