Power assisted manually propelled vehicle and wheel assembly...

Details Power assisted manually propelled vehicle and wheel assembly... Power assisted manually propelled vehicle and wheel assembly...

A - Human Necessities

61

G

A61G 5/04 (2006.01) B60K 1/00 (2006.01) B60K 1/04 (2006.01) A61G 5/10 (2006.01)

Patent

CA 2230641

A manually propelled vehicle has a power assisted drive wheel assembly coupled to a stationary chassis and a control system for actuating the powering. The drive wheel assembly is integrated with a gearless electric motor. The motor includes a stator and a rotor rotatable relative to the stator. The drive wheel assembly includes a stationary wheel support coupled to the chassis and a rotatable drive wheel rotatably mounted to the stationary wheel support. The drive wheel has an outer rim and an inner ring, the outer rim being connected to the inner ring by support members. The stationary wheel support includes a first annular well for housing the control system and a power source, and a second annular well formed concentrically around the first annular well. The stator is mounted to the stationary wheel support in the second annular well and the rotor is mounted to the inner ring, which is rotatably coupled to the distal portion of the stationary wheel support via bearings. The drive wheel freely rotates relative to the stationary wheel support when no power is applied to the electric motor or if the motor fails. A grip ring is connected to the drive wheel. The control system includes a torque sensor for detecting torque applied by the grip ring. The signal from the torque sensor is used as a variable for activating the motor.

Véhicule à propulsion manuelle comportant un mécanisme de propulsion assistée et un système de commande associé. Le mécanisme de propulsion est couplé à un moteur électrique sans engrenage. Le moteur comporte un stator et un rotor. Le mécanisme de propulsion comporte une roue motrice tournant sur un axe fixé au châssis du véhicule. La roue motrice présente une jante extérieure et une couronne intérieure reliées par des éléments de support. L'axe fixe de la roue motrice comporte un premier logement annulaire pour loger le système de commande de propulsion assistée et la source d'alimentation électrique et un deuxième logement annulaire concentrique et extérieur par rapport au premier. Le stator est monté sur l'axe fixe de la roue motrice, dans le logement annulaire extérieur, et le rotor est monté sur la couronne intérieure, qui tourne sur l'extrémité distale de l'axe fixe de la roue par l'intermédiaire de paliers. La roue motrice tourne librement sur l'axe fixe quand l'alimentation du moteur électrique est coupée ou que le moteur tombe en panne. Un anneau de serrage est relié à la roue motrice. Le système de commande comporte un détecteur de couple qui détecte le couple appliqué à l'anneau de serrage et émet un signal qui sert de variable pour la mise en marche du moteur.

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