CHASSIS OF VEHICLE FOR MOVING UP AND DOWN THE STAIRS Russian patent published in 2007 - IPC B62D57/28 A61G5/06 

FIELD: transport engineering; invalid chairs.

SUBSTANCE: invention is designed for moving man or load up and down the stairs or over even surface. Chassis of vehicle contains base 1, wheel pair 2, 3 with drive to rotate wheels around their axles 4, 5 and mechanism to lift wheel pair 2, 3 with base on step 13. Said lifting mechanism contains lever type stops 6, 7 with friction pivots 8, 9 in planes spaced along width of chassis and parallel to planes of wheels 2, 3. Working end of stops 6, 7 is provided with L-shaped bent free end furnished with said friction pivot 8 which intersect plane of rotation of near wheel 2. Provision is made for power contact of friction pivot 8 with wheel 2 for braking of wheel at standstill and/or in motion.

EFFECT: improved operating characteristics of vehicle chassis as to smoothness of running, dynamic stability on stairs and road capacity, reduced energy consumption and facilitated design of lifting mechanism.

5 cl, 7 dwg