| 摘要 |
The stair-climbing wheelchair is an electric wheelchair; it also moves downstairs and on level ground. It is constructed from simple and durable components. It is equipped with the seat (1) with the front wheels (17) moved by the drive (21) via the strand transmissions (21). The rear wheels (27) are mounted in the wheel forks with the steering system (33) mounted above the bushings (30) of the length (h2) favorably approx. 300 mm. The said wheelchair is equipped with the drive (45) that lifts and lowers the rear wheels (27) together with the steering system to the height (h1) of approx 250 mm. It is equipped with the stair-climbing apparatus consisting of the drive (54), front mechanism (58) with the tilting frame (62) and the rear mechanism (75). The frame (62) is tilted by the actuator (69) by the angle (a + ß) favorably lower than 45 degrees. The mechanisms rotate the two three- wheel assemblies (68 and 80), whilst the rear assemblies stop in such a way that the rear wheels are reversible on level ground. |
