초록 ▼

In cultivating or rolling soil by rollers with several hinged interconnected frame sections, each having a set of rolls on a common shaft, rotatably journalled at the ends of downwardly dependent arms the rolls closest to a hinge will not roll the soil at all or too loosely in case of irregular or u

In cultivating or rolling soil by rollers with several hinged interconnected frame sections, each having a set of rolls on a common shaft, rotatably journalled at the ends of downwardly dependent arms the rolls closest to a hinge will not roll the soil at all or too loosely in case of irregular or uneven ground. To avoid this inconvenience the arms are pivotably and preferably also resiliently mounted on the frame in addition to which the arms are slightly rotatable or twistable about its longitudinal axis to allow a deviation from horizontal of the shaft which thus may follow the irregularities of the ground so that the roller rolls the soil very efficiently.

대표청구항 ▼

An arrangement in a ring roller intended to be towed by a tractor and including hingeable outboard sections which can be folded upward, and a middle section provided with at least one wheel arranged to be let down to keep the roller lifted when the roller is towed on a substructure, a frame included

An arrangement in a ring roller intended to be towed by a tractor and including hingeable outboard sections which can be folded upward, and a middle section provided with at least one wheel arranged to be let down to keep the roller lifted when the roller is towed on a substructure, a frame included with each of said sections, rings being included in said middle section and each said outboard section, said rings being arranged on each section on at least one common shaft pertaining to the respective section, elongated swinging arms being provided, the ends of each said shaft being rotatably mounted in bearings at the lower free ends of respective ones of said arms, which said arms are mounted on and extend at an angle downward from the frame of each said section, the shaft carrying the rings of a specific said section being connected to the frame of said section by said arms, said arms having means allowing the shaft and frame to each have mutual angular displacement relative to the longitudinal axis of each of said arms, in which said angular displacement allowing means includes a first resilient means allowing the arms carrying the shaft of said specific section to undergo a resiliently limited pivoting movement with respect to said frame along an axis lying in a forward facing vertical plane intersected by said arms, and a second resilient means spaced from said first resilient means and allowing each said arm to twist about its longitudinal axis in response to angular displacement of the arm relative to its longitudinal axis caused by the shaft tilting from the horizontal and thereby allowing the shaft with its rings to adapt itself to the irregularities of the ground irrespective of the relative angular relationship of the interconnected frames.