Individual vehicle usable in a manual or a motorized version, in particular a wheelchair or a tricycle

Individual vehicle usable in a manual version and a motorized version, more specifically one of a wheelchair and a tricycle, said vehicle including a chassis (1) having a front and rear, said chassis provided, at the rear, with two laterally outwardly extending bearings (4) for receiving one of a pair of removable wheels (2), and a self-contained, removable propulsion unit (12), said propulsion unit including:

• a locking means (16) for locking the unit to the chassis (1),
• driving wheels (13) rotatably about an axis, and
• means (14) for rotationally driving said driving wheels (13), said propulsion unit (12) further comprises support means (15) for directly supporting the bearings (4), and a control means (17) for moving the locking means (16) between an active position wherein the propulsion unit is locked to the chassis and an inactive position wherein the propulsion unit is unlocked from the chassis, said locking means (16) cooperating with retaining means (11) provided on the chassis when the bearings (4) rest directly on said support means (15).