초록 ▼

A drive assembly for axially adjusting at least one roll of the upper and lower pairs of first intermediate rolls of a cluster mill of the 20-high (1-2-3-4) type. The drive comprises a first horizontally oriented rack connected to one of the first intermediate rolls by a link and universal joint ass

A drive assembly for axially adjusting at least one roll of the upper and lower pairs of first intermediate rolls of a cluster mill of the 20-high (1-2-3-4) type. The drive comprises a first horizontally oriented rack connected to one of the first intermediate rolls by a link and universal joint assembly. As least one idler gear, with its axis horizontally oriented, is meshed with the first rack. A second rack horizontally oriented is affixed to the piston of a horizontally oriented hydraulic cylinder. The second rack and the hydraulic cylinder are in parallel spaced relationship to the first rack. The second rack is meshed with the at least one idler gear so that axial movement of the piston and second rack in the hydraulic cylinder will result in axial movement of the first rack via the at least one idler gear to axially shift the at least one roll. Such a drive can have its first rack attached to a pair of rolls by a universal joint assembly and a link for each roll so that the drive can simultaneously axially shift both rolls. Four such drives can each be used to axially shift the four first intermediate rolls independently. In any of the embodiments the second rack may have a piston at both of its ends in its hydraulic cylinder so that the effective piston areas are the same in both directions of movement.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are:] [1.] A drive for axially shifting at least one of the four axially adjustable first intermediate rolls of a cluster mill of the 20-high (1-2-3-4) type, said drive comprising a drive housing, a first gear

[ The embodiments of the invention in which an exclusive property or privilege is claimed are:] [1.] A drive for axially shifting at least one of the four axially adjustable first intermediate rolls of a cluster mill of the 20-high (1-2-3-4) type, said drive comprising a drive housing, a first gear rack mounted in said drive housing and axially shiftable therein, a link, a first universal joint connecting said link to said first gear rack, a second universal joint connecting said link to said at least one first intermediate roll, at least one idler gear rotatively mounted within said drive housing and meshed with said first gear rack, a second gear rack parallel to said first gear rack with said at least one idler gear therebetween and meshed with said second gear rack, said second gear rack having first and second ends, a hydraulic cylinder affixed to said drive housing, said second gear rack being mounted in and axially shiftable in said cylinder, a first piston affixed to said first end of said gear rack, whereby axial movement of said piston and second gear rack in said hydraulic cylinder will cause corresponding axial movement of said first gear rack in said drive housing by virtue of said at least one idler gear, and axial shifting of said first gear rack will cause axial adjustment of said at least one first intermediate roll by virtue of said link and said first and second universal joints.