Steering gear

摘要

A vehicle steering for turning the steerable wheels of a vehicle having a fluid motor with a housing (11) defining a fluid chamber (13) and a piston (14) in the chamber dividing the chamber into first (16) and second (18) chamber portions. A rotatable steering input member (33) is supported by the housing. A rotatable follow-up member (100) is associated with the piston and rotatable upon movement of the piston in the chamber. A valve controls pressurized fluid flow to the first and second chamber portions. The valve comprises first (40) and second (41) relatively movable valve parts. One of the valve parts is connected with the input member and the other of the valve parts is connected with the follow-up member forming a unit therewith (116). The unit has a surface (129, 134) against which fluid pressure in the first and second chamber portions acts tending to create an axial force on the unit. Pressure is applied to another surface area (136) of the unit to balance the axial force acting on the unit.