| 摘要 |
<p>"ROCK WINDROWER" A windrower drum is journalled for rotation on the lower ends of and between a pair of arms each of which forms part of a transverse support member supported by the chassis. An arm extends upwardly from the transverse support and forms a crank arm with the aforementioned arms supporting the windrower drum. A floating cylinder lug is pivoted intermediate the ends thereof to said chassis and a piston and cylinder assembly extends between the distal ends of said crank arm and said floating cylinder lug. The weight of the drum and arms engages the drum with the ground with the depth of penetration being controlled by the effective length of the piston and cylinder assembly which acts as a rigid link when set. The drum, support arms, floating cylinder lug and crank arm all act as one unit so that the drum can elevate if an obstruction is encountered and returned by gravity to the preset position after passing the obstruction thereby eliminating any counterbalance springs and the like. The drum can be locked in a transport position or can be locked for frame levelling purposes.</p> |
