| 摘要 |
PURPOSE:To advance a moving car over a convex of an unleveled land by rotary driving a pair of screw rods on the lower face of a chassis. CONSTITUTION:When riding over a staircase, step or a convex of unleveled land, a lever 17 is moved downward to gear an intermediate gear 16 with gears 14, 15 at the side of main wheel 8 and a climbing wheel 9, thus to drive the climbing wheel 9 by means of a motor 7 of main wheel 8 then its projection 12 is engaged with a step 13 of a staircase to climb on the staircase. When the abdomen of the chassis 1 rides on the convex of the unleveled land to block the drive wheel from grounding, motors 20, 20 will drive the screw rods 18, 18 to ride over the convex. Right and left screws are etched respectively on the right and left screw rods 18, 18 against the traveling direction of a car where the inclination against the traveling direction of the car will correspond to the lead angle thereby the thread ridge will approximately perpendicular against the traveling direction. |
