| 摘要 |
<p>Stepped or multi-edge frictional edges (T0, T1, T2,...Tn) on skis and boards for snowboarding are solving the problem of cross and longitudinal stability at the inclination angle (epsilon = 0 degrees) and make possible a fast and safe skiing also on a laterally uneven terrain. The zero step (S0) usually has two parallel frictional edges (T0), while the other ones (T1,..., Tn) are raised and curved, so that in the case of a straight drive, they do not touch the ground and do not produce cross forces. The turn for the angle (phi) is started at the inclination of a multi-edge ski (2), of a multi-edge ski with intermittent frictional edges or frictional segments (3) and of a clamped ski (4) for the angle (epsilon), and after the contact to the ground with two frictional edges, effects of compression and pressing are created in the front part and ploughing in the rear part. Each of them individually or both together cause the creation of momentum, turning and increase of friction on side parts also in the case of lateral sliding. The splitting angles (gamma 1, gamma 2, ... gamma n) to (T0, T1, T2,...Tn) greater than zero degrees enable high friction coefficients, which prevents lateral sliding and slippage during the turn also at high speeds and loads.</p> |
