LIFT ESPECIALLY FOR CHANGING THE POSITION OF THE SEAT IN A WHEELCHAIR

The subject of the invention is a lift which is mainly used in wheelchairs to change the position of the seat and thus to change the position of a person sitting in the wheelchair. On the known scissor lift there is attached an upper frame consisting of a horizontal fixed part 1 and a tilting plate 2 attached to arms 3. In the fixed part 1 of the upper frame, tilting arms 5 are pivotally mounted on axle 4, with the other end pivotally mounted on axle 6 in arms 3 of the tilting plate 1, driven by the actuator 7 mounted in fixed part 1 of the upper frame. Actuator 7 through the levers of the cam tilting system drives tilting arms 5. The tilting plate 2 can be tilted in both directions around axle 6 that is around the attachment point of the arms 3 in the tilting arms 5. The tilting drive in both directions is the actuator 7 which is mounted with one end in the fixed part 1 of the upper frame and the other end is mounted in the lever of the cam tilting system of the tilting arms 5. In arms 3 of the tilting plate 2 there are placed control strips 8 with front 9 and rear pins 10 at the ends, longitudinally movable in arms 3 so that in one end position the rear pins 10 of each control strip 8 are locked in the hooks 12 of the connector 11 - then the tilting plate 2 is tilted backwards - backwards tilt is forced because the connectors 11 are locked with the arms 3 and the pin 13 moves in the guide 14 - the front ends of the arms 3 rise because the front pins 9 do not bind the tilting arms 5 with the arms 3. In the second end position, the front pins 9 of each control bar 8 are locked in the front hooks 15 in the tilting arms 5, so the extension of the piston rod 7 causes the tilting arms 5 mounted in the axles 4 together with the arms 3 locked with them to rotate around this axle 4 and then the rear ends of the arms 3 rise and the seat tilts forward.