| 摘要 |
<p>The traction aid includes arms (7a-7h) respectively fitted at carrier body (6) respectively with their first part (7a'-7h') and the two parts (7a''-7h'') of which are arranged across the running surface (2') of the drive wheel (2). So that the second parts (7a''-7h'') have at least one traction facility (8), on their sides pointing away from the running surface of the drive wheel. The axis (5) of rotation is uncoupled from the drive axis (4), and at least one of the arms (7a,7b) is bringable from a first activated setting (A,B) in to a second deactivated setting (A',B').</p> |
