| 摘要 |
A raking machine has at least one circular tined rake member that is rotatable about an upwardly and forwardly inclined axis of rotation. The tines are pivotably mounted on the outer perimeter of the rake member to turn about horizontal pivot axes. Preferably, the diameter of the rake member is defined by the path described by the tips of the tines in operation and is 2 to 3.3 meters. During operation, the tines, viewed in plan are directed outwardly from the perimeter and rearwardly with respect to the direction of rotation so that with travelling speeds over the ground between 6 and 12 kms/hour and when the member is driven at a speed of rotation of 80 rev/min., the tine at the front of the rake member at any moment extends at an angle of about 45 DEG to 90 DEG , again viewed in plan, to a line passing through the tip of that tine and tangential to the path of the tine tip with respect to the ground, when the tine tip is located in a vertical plane containing the rotary axis of the rake member and extending in the direction of travel of the machine over the ground. Such a raking machine, with a large diameter rake member, achieves satisfactory raking results within a broad range of travelling speeds, particularly on uneven soil.
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