Chain reel for tillage implement
In lieu of rigid bars, a tillage reel utilizes a number of elongated flexible elements such as lengths of link chain that are spaced circumferentially around the reel and extend axially thereof. The flexible elements bow outwardly by centrifugal force as the reel rolls along the ground during tillage operations to impact and fracture clods encountered at the lower front extremity of the reel. When the reel is used in connection with strip till operations, the flexible elements bow upwardly and inwardly along the lower periphery of the reel as they engage and conform to the transverse cross-section of the strip till berm, thereby avoiding destruction of the berm notwithstanding the clod-pulverizing action provided by the flexible elements.
1. A tillage machine comprising:
a ground-penetrating tillage shank adapted to leave clods of soil behind the shank as the shank is moved through the soil;
berm-forming structure behind the shank for forming loose soil and clods left by the shank into an elongated, fore-and-aft extending berm; and
a ground-driven, rotatable reel disposed behind the berm-forming structure and the shank in on-center alignment with said shank in such a position that the reel engages the clods left by the shank,
said reel including support structure rotatable about a transverse axis as the reel is advanced in a forward direction while engaging the ground,
said reel further including a plurality of elongated flexible elements carried by said support structure and spaced circumferentially about the periphery of the reel for engaging and breaking up the clods without destroying the berm as the reel rolls along the ground,
said flexible elements comprising lengths of chain having a series of interconnected links.
2. A tillage machine as claimed in claim 1 ,
said support structure including a pair of axially spaced apart, ground-engaging wheels,
said lengths of chain spanning said wheels.
3. A tillage machine as claimed in claim 2 ,
said links being constructed from metal.
4. A tillage machine as claimed in claim 2 ,
said length of chain having a pair of opposite ends,
one end of said length of chain being anchored to one of said wheels and the other end of said length of chain being anchored to the other of said wheels.
5. A tillage machine as claimed in claim 1 ,
each of said lengths of chain extending generally parallel to the axis of rotation of the reel.
6. A tillage machine as claimed in claim 2 ,
each wheel of said pair of wheels comprising a generally circular plate having a marginal periphery that is outturned to present a lip having a ground-engaging surface that extends generally parallel with the axis of rotation of the reel.
7. A tillage machine as claimed in claim 6 ,
said lip being serrated to present a circumferential series of notches therein.
8. A tillage machine as claimed in claim 7 ,
said notches being generally triangular with a pair of opposite edges converging toward an inwardly disposed apex.
9. A tillage machine as claimed in claim 8 ,
said apex of each notch having a slit that is sized to receive and contain a link of the chain when the link is turned on edge,
said chain having another link on an outboard face of the plate that is turned at right angles to the link in the slit and is secured to said outboard face.
10. A tillage machine as claimed in claim 9 ,
said links being constructed from metal.
11. A tillage machine as claimed in claim 1 ,
said links being constructed from metal.
12. A tillage machine as claimed in claim 1 ,
said support structure comprising a series of axially spaced apart wheels along the length of the reel,
adjacent wheels in the series having a plurality of elongated flexible lengths of chain spanning between the adjacent wheels and spaced circumferentially about the periphery of the reel.
13. A tillage machine as claimed in claim 12 ,
said chains being constructed from metal.
14. A tillage machine as claimed in claim 2 ,
each length of chain comprising a stretch between the wheels that is longer than the distance between the wheels such that the chain stretch is loose and flexible.