| 摘要 |
A power steering gear assembly including a centrally bored rack toothed piston dividing a power cylinder in a pair of fluid pressurized chambers, a sector gear meshing with the piston, a valve assembly communicating the pressure chambers with a source of pressurized fluid and including a pair of rotatable valve members nested together in telescopic relation, a centrally bored worm connected to the outer valve member for joint rotation therewith and extending into the bore of and connected to the piston to cause rotation of the worm in response to axial movement of the piston, an operating shaft formed integrally with or connected to the inner valve member for joint rotation therewith and a torsion rod providing follow-up movements between the valve members, the torsion rod extending into the bore of the worm, which worm bore in turn communicates certain axial slots formed in the outer valve member with the pressure chamber spaced farthest therefrom, other axial slots formed in the outer valve member opening directly to the pressure chamber immediately adjacent the valve assembly and fluid inlet and outlet ports communicating with the axial slots through the inner valve member.
|
