Rotational energy storage device and tools incorporating same

B - Operations – Transporting – 25 – B

Patent

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Details

B25B 21/02 (2006.01) B25B 21/00 (2006.01) F16D 5/00 (2006.01) F16F 15/30 (2006.01) F16H 33/02 (2006.01)

Patent

CA 2318587

A rotational energy storage device (10) or spring which includes a roller-cam assembly having a shaft (14), a ring (12) rotatably disposed about the shaft, and at least one roller (16) disposed between shaft and ring. The roller (16) is configured such that, upon rotating the ring relative to the shaft, the roller interferes with the ring and the shaft to convert and effect storage of mechanical energy created by the relative rotation of the ring and the shaft. Preferably a plurality of spaced rollers are positioned between ring and shaft. A cam geometry (20) which is symmetrical or asymmetrical is provided on the shaft, the ring, the roller, and combinations thereof. A rotational energy storage device having a back-up ring with alternating thin and thick cross-sectional areas is further provided which is indexed to provide regions of low and high stiffness regions against each roller.

La présente invention concerne un dispositif (10) de stockage d'énergie rotationnelle ou ressort qui comprend un assemblage de came à galets comprenant un arbre (14), une bague (12) monté rotatoire autour de l'arbre, et au moins un galet (16) disposé entre l'arbre et la bague. Le galet (16) est conçu de manière à ce que, lors de la rotation de la bague par rapport à l'arbre, le galet interfère avec la bague et l'arbre de manière à convertir et à effectuer le stockage d'énergie mécanique créée par la rotation relative de la bague et de l'arbre. De préférence, une pluralité de galets sont disposés entre l'arbre et la bague. L'arbre, la bague et le galet présentent une géométrie de came (20), symétrique ou asymétrique, ou une combinaison des deux. L'invention concerne aussi un dispositif de stockage d'énergie rotationnelle présentant une bague d'appui dotée de zones alternativement minces et épaisses, en coupe transversale, indexées de manière à présenter des régions de basses et de hautes rigidités contre chaque galet.

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