| 摘要 |
<p>The roller has a torsion unit (42) with a coupling element for mechanical coupling of spring-elastic torsion elements with a rear platform (20). A coupling unit (56) is utilized for mechanical coupling of a handlebar unit (54). A bearing unit comprises a first rear bearing for bearing a rear carrying axle (82) and a second rear bearing for making a rear roller (80) to be swingable around a bearing axis (90). The coupling unit comprises a coupling part (60) and another coupling part for direct coupling with the torsion elements. The spring-elastic torsion elements are torsion bars made of resilient plastic.</p> |
