Tillage implement

摘要

A tillage implement includes a main frame with adjustable toolbar sections thereon which each support respective tillage units thereon for engaging the ground. According to one aspect of the invention, the toolbar sections are angularly adjustable about a pivot head at one end thereof while also being slidable in a longitudinal direction of the toolbar section to maintain alignment of the tillage units. The pivot head is elongate in a direction transverse to the toolbar section to resist moments applied to the toolbar section by the tillage units engaging the ground while the toolbar section remains adjustable. In another aspect of the invention, the tillage units each comprise a trailing arm supporting the respective coulter disks thereon. The trailing arm is pivoted between two side plates fixed to the toolbar section and biased downward by a spring enclosed between the side plates to resist debris catching on the spring.

主权项

1. A tillage implement comprising:
a main frame arranged for connection to a towing vehicle so as to be supported for movement across the ground in a forward working direction; a plurality of toolbar sections supported on the main frame so as to be oriented transversely to the forward working direction; each toolbar section extending in a respective longitudinal direction between a first end coupled to the main frame by a respective first mounting assembly and a second end coupled to the main frame by a respective second mounting assembly such that the toolbar section is adjustable about an upright axis to vary an angle of the toolbar section relative to the forward working direction; and a plurality of tillage units supported on the toolbar sections respectively, each tillage unit comprising:
a trailing arm extending generally rearwardly from a forward end supported on the respective toolbar section to an opposing trailing end such that the trailing end is movable upwardly from a normal working position to a deflected position;a coulter disk supported on the trailing end of the trailing arm so as to be arranged for tilling the ground; anda biasing member arranged to bias the trailing arm downwardly towards the normal working position; the first end of each toolbar section comprising a pivot member which is elongate generally in the forward working direction between front and rear bearing surfaces of the pivot member which are longitudinally opposed such that the pivot member extends transversely to the longitudinal direction of the toolbar section; each first mounting assembly comprising a socket arranged to receive the pivot member matingly therein, the socket including front and rear bearing surfaces engaging respective ones of the front and rear bearing surfaces of the pivot member such that:
the pivot member is fixed relative to the main frame in the forward working direction;the pivot member is slidable relative to the main frame in a lateral direction perpendicular to the forward working direction; andthe pivot member locates said upright axis of the toolbar section extending therethrough; each second mounting assembly comprising upper and lower bearing surfaces slidably receiving the toolbar section therebetween; the second end of each toolbar section comprising a follower in mating engagement with a respective track formed on the bearing surfaces of the respective second mounting assembly; the track of each second mounting assembly being arranged to guide movement of the respective toolbar section in the lateral direction as the second end of the toolbar section is displaced in the forward working direction by pivoting the toolbar section about the respective upright axis.