Threshing unit for combine harvesters for optimized crop conveyence

A threshing unit for combine harvesters, comprising

• a cylinder;
• an assigned concave;
• at least one drum situated downstream of the cylinder, redirecting a threshed crop material out of a threshing region, and conveying it further in a direction of a grain separating device;
• a mechanical form-locked drive connection disposed between the cylinder and the at least one drum;
• wherein threshing slats of the cylinder and slats of the at least one downstream drum are situated at a distance from one another in a circumferential region of the cylinder in an arrangement such that a number of said slats on the at least one drum downstream of the cylinder corresponds to a half or a multiple of a number of said threshing slats of the cylinder, and
• wherein peripheral speeds of the cylinder and the at least one drum are synchronized with one another by the mechanical form-locked drive connection such that in a turning and scraping region said slats of the cylinder and the at least one drum are always positioned in a position selected from the group consisting of a position opposite each other, a leading position that slightly deviates from the position opposite each other, and a trailing position which slightly deviates from the position opposite each other.