| 摘要 |
A cultivator or harrow has an elongated frame and a row of rotatable soil working members pivoted to the frame for independent displacement when an obstacle is contacted. Each soil working member can be tined support having an upwardly extending shaft drivenly connected to a common drive shaft or gear train. Pivotable connections between the frame and the upwardly extending shafts permit deflective movements of each member as a unit with respect to a hollow beam of the frame. The connections can be housings and/or spring biased tie parts with bearings or bracket-support pivot connections or cranks that enable the soil working members to move about at least one axis relative to the frame beam. Also, the upwardly extending shafts can be connected to the driving means by universal joints or resilient couplings. Each soil working member is biased by springs or normally assumes a central equilibrium position. Additional rotary soil working members can be fixed to the frame and positioned between the deflectable members. |
