| 摘要 |
<p>The invention relates to means for improving traction efficiency of rubber tyred agricultural wheeled tractors and the like. A series of spades (23) are mounted on a driving tyre (10) in a posnion to be movable between ground engaging contact and disengaged position, against side wall (17) of tyre.
<??> Each of said spades (23) is fixedly secured by coupling means to a wire rope (21), mounted upon a series of anchor means (18) scured to the shoulders (12) of the tyre lugs (11). Rotational movement of said wire rope (21) moves the spades (23) between said ground engaging contact and said disengaged position. </p> |
