| 摘要 |
<p>A pull-type mower conditioner (10) has a support frame (12) on which a floating header (50) is mounted, via upper and lower links (64, 72) for movement between transport and working positions. Upper and lower conditioning rolls (46, 32) receive crop from the header. The upper roll (46) is mounted between a pair of bell-cranks (36) which are swingable on the frame (12) to move the upper roll (46) toward or away from the lower roll (32). A spring (78) is connected between either bell-crank (36) and the corresponding lower link (72), and serves in a simple manner both as a float spring for the header (50) and for biasing the upper conditioning roll (46) toward the lower roll (32).</p> |
