Tine mounting for rotary harrow including U-shaped recess

Abstract

A rotary harrow has soil working members, each of which includes a tine mounting wherein a horizontal support has a holder with a tine at one end, or both ends. Near the top of the fastening portion are one or two recess stops that are engaged by tightening elements to urge the fastening portion in tight engagement within an internal bore of the holder so that tension or compression is exerted on the interfit between bore and fastening portion. The fastening portion can taper upwardly and the bore is shaped with surfaces that conform to the taper of that portion. The tightening elements can be a nut and bolt combination, an externally threaded member or a pivoted cam that is turned with a tool. The fastening portion can have a region of reduced diameter so that it bears on two spaced apart areas of the bore.Additionally, the fastening portion can include a substantially U-shaped recess, which can be engaged by one of the nut and bolt combination or the externally threaded member.

Description

Claims

1. A tine mounting for a rotary harrow including a generally horizontal support with at least one tine holder on said support, a tine having a fastening portion and said portion being fitted in an internal bore of said holder, said fastening portion having at least one recess, said recess, viewed lengthwise of the longitudinal axis of said fastening portion, being substantially U-shaped, tightening means on said mounting and said tightening means engaging a flat wall of said U-shaped recess and urging the said fastening portion into tight engagement with said bore.

2. A tine mounting as claimed in claim 1, wherein said tightening means comprises a separate element that engages said wall, said separate element having an external screw-threaded surface that receives a fastening nut.

3. A tine mounting as claimed in claim 2, wherein, said external screw-threaded surface projects laterally from said recess and beyond said fastening portion.

4. A tine mounting as claimed in claim 1, wherein said tightening means comprises a bolt having a head and said head is received in said U-shaped recess, a screw-threaded shank of said bolt projecting from said fastening portion and a tightening nut engaging said shank.

5. A tine mounting as claimed in claim 1, wherein, said U-shaped recess is located substantially outside and above said holder.

6. A tine mounting as claimed in claim 1, wherein said fastening portion comprises two spaced apart regions and a further region of reduced diameter between the two regions, said two regions separately engaging two internal regions of said bore.

7. A tine mounting as claimed in claim 1, wherein said fastening portion has lugs that cooperate with notches in said holder and prevents said tine from turning about the longitudinal axis of its fastening portion, said lugs being located diametrically opposite one another with respect to the longitudinal axis of said fastening portion and said notches being located at the lower side of said holder.