Disc for an agricultural implement

摘要

The invention refers to a disc (8) for an agricultural implement (1) comprising an annular, outside a predetermined center diameter (D) defined, soil-cultivating portion (44), a central, inside a predetermined center diameter (d) defined, dish-shaped portion (43), with a boss-receiving, inner side and between these portions an existing, annular connection portion (45) with fastening screw holes (46). The connection portion (45) is a truncated conical portion, the inner mantle surface of which is mainly straight or double-bowed with the convex side facing said inner side and a line through the opening plane in the hole opening of each fastening screw hole on said inner side forms an angle α with a plane that is perpendicular to the center line of the disc, wherein the angle α is 5°-10°.

主权项

1. Disc for an agricultural implement comprising an annular, outside a predetermined centre diameter (D) defined, soil-cultivating portion, a central, inside a predetermined centre diameter (d) defined, dish-shaped portion, with a boss-receiving, inner side and between these portions an existing, a connection portion with fastening screw holes, which are designed to accept fastening screws parallel with a disc centre line of said disc and parallel to each fastening screw, wherein said connection portion is a truncated conical portion and that a line parallelly through the opening plane in the hole opening of each fastening screw hole on said inner side forms an angle (α) with a plane that is perpendicular to the disc centre line, wherein said angle (α) is 5°-10°, and
whereby transitions between said soil-cultivating portion and said connection portion and between said connection portion and said central dish-shaped portion are arranged without edges and are comprised of obtuse external angles, each fastening screw hole in the connection portion of the disc has a sunken part, the truncated conical portion has an angled opening relative to the sunken part to accept a head of each fastening screw, said angled opening is flush with an outer surface of the truncated conical portion, the truncated conical portion has a surface, the connection portion is angled inward towards the dish-shaped portion by said angle (α) where an inner surface of the truncated conical portion abuts against a boss, and an outer end surface of the dish-shaped portion forms an additional angle (β) in relation to the surface of the truncated conical portion.