Steering device, especially for farming tractors & similar commercial vehicles

Abstract

A steering device comprises a rigid steering axle (12) pivotable about a substantially horizontal axis, the wheels (5) of which are driven by a cardan shaft (4) arranged between the steering axle and the transmission (2) the transmission being spaced apart from the steering axle, comprising a power steering gear (22) actuatable by a steering wheel (14) and a steering shaft (23), the power steering gear having a pinion (30), which is connected with the steering linkage of the steering axle, and comprising a steering cylinder being an integral part of the steering linkage, the steering cylinder being actuatable by fluid under pressure supplied by the power steering gear, characterized in that a steering cylinder (21) is positioned coaxially with respect to the cardan shaft (4), the steering cylinder being connected with the steering axle (12) and comprising a hollow piston rod (28) to receive the cardan shaft (4), and that a first toothed rack (29) of the piston rod of the steering cylinder is in driving connection with the pinion (30) of the power steering gear (22) and a second toothed rack (35, 42) of the piston rod of the steering cylinder is in driving connection with the steering linkage (37, 38, 39, 40, 41) of the steering axle (12).

Dependencies are inferred from the claim text.