JPS5832066U - power steering device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view showing a conventional power steering system, Figure 2 is an enlarged view of the spool valve in Figure 1 and its surroundings, and Figure 3 is along the ■-■ arrow line □ in Figure 2. A sectional view, FIG. 4 is a sectional view similar to FIG. 3 showing an embodiment of the power steering device according to this invention, and FIG.
FIG. 6 is a cross-sectional view along the arrow line and the arrow line, and FIG. 6 is a perspective view showing the offset pin in the same embodiment. C In the drawings, the same or corresponding parts are designated by the same reference numerals. 1...Input shaft, 2...Torsion bar, 3...Worm shaft, 4...
・Guide mechanism, 5...Piston, 6...
Sector gear, 7... Output shaft, 8.9...
Pressure chamber, 10...Spool valve, 11...
... Guide groove, 12 ... Ball, 13 ...
...Ring, 14... Spiral groove, 15, 16.1
7...Boat, 18...Valve sleeve, 19...Pin, 20...Pole,
21...Engagement groove, 22...Valves'
J-F, 23... Offsera I Pin, 24...
... Male thread, 25 ... Engaging protrusion, 26 ...
...Housing, 27, 29...Communication hole,
28...Pressure introduction hole, 29...Opening 1
．． 30...slit split, 31...blind lid,
32...Tatsukunatsuto, A...Punch driving part. Figure 1 Figure 3 -

Claims (1)

[Scope of utility model registration request] An input shaft that is rotationally driven in conjunction with the driver's seat handle,
A worm shaft disposed concentrically with the input shaft on an extension of the input shaft, a torsion bar connecting the worm shaft and the input shaft, and a piston fitted around the outer periphery of the worm shaft. , a guide mechanism interposed between the piston and the worm shaft and guiding the piston in the axial direction according to the rotation of the worm shaft, an output shaft located in a twisted position perpendicular to the piston, and the output shaft. a sector gear that rotates integrally with the output shaft around the shaft and meshes with the piston; a spool valve that is slidably fitted around the outer periphery of the input shaft; and a spool valve that is fitted to one end of the spool valve. and a ring having a spiral groove formed on its inner surface; an engaging body that radially penetrates one end of the spool valve and is engaged with the spiral groove; and a guide groove that slidably accommodates the engaging body in the axial direction; and a valve that is fitted around the ring and the spool valve so as to be rotatable in the circumferential direction, and connected to the worm shaft in a relatively unrotatable manner in the circumferential direction. a housing that supports the piston slidably in the axial direction and rotatably supports the valve sleeve in the circumferential direction and forms a pair of pressure chambers facing each other on both end surfaces of the piston; a pressure introduction hole opened in the housing so as to face the outer peripheral surface and connected to a hydraulic power source; and a pressure chamber adjacent to the pressure introduction hole opened in the housing so as to face the outer peripheral surface of the valve sleeve. In the power steering device, the power steering device includes a pair of communication holes communicating with each of the valve sleeves, and three ports passing through the valve sleeve in the radial direction and corresponding to the pressure introduction hole and each communication hole, respectively. A power steering device, characterized in that it is provided with an adjustment mechanism capable of rotating the ring circumferentially relative to the valve sleeve and fixing it in a predetermined position.