POWER STEERING VALVE AND MANUFACTURE THEREOF

摘要

A method of balancing a hydraulic valve for a power steering gear in which the valve is subjected to a pressure medium, the valve comprising a sleeve (4) journalled on an input shaft (2), and the sleeve having a torsion bar (8) connected thereto via a driven member. The method comprises the steps of firstly inserting the valve into a balance housing (222), then secondly determining the neutral position of the inputshaft (2) relative to the sleeve, then thirdly fixing the neutral position by rotational connection of the inputshaft and torsion bar (8). The pressure medium used to determine the neutral position is gaseous medium such as air. The rotational connection of the input shaft (2) and torsion bar (8) is effected by a bonding process such as adhesive bonding (11), soldering, brazing or welding. The interface between the bore of the input shaft (2) and the fixing end of the torsion bar (8) has a support region (12) and a bonding region (13). The diametral clearance at the bonding region (13) is more than at the support region (12) so that an annular cavity (100) is provided for the bonding agent (11).