JPS6187270U

JPS6187270U -

Info

Publication number: JPS6187270U
Application number: JP17190584U
Authority: JP
Priority date: 1984-11-13
Filing date: 1984-11-13
Publication date: 1986-06-07

Description

[Brief explanation of drawings]

第１〜４図は本考案の実施例を示しており、第
１図は断面側面図、第２図は正面図、第３図は第
２図の−線断面図、第４図はパワーステアリ
ング装置に設けたリリーフ弁の断面図、第５図は
本考案の変形例を示す横断面図、第６図は本考案
と従来技術の圧力オーバライドを示すグラフ、第
７図は本考案と従来技術の油路開放初期状態を示
す説明図、第８図は従来技術を示す正面図、第９
，１０図はパワーステアリング装置内の油圧回路
の１例を示すものであつて、第９図は横断面図、
第１０図は正面図である。１０…リリーフ弁、１１…ポペツト、１２…弁
座、１３…スプリング、１８…フランジ部、１９
…ピストン部、２７…拡大開口部、２７ａ…端縁
、２３…回路圧油入口側端部、２４…外周面、２
５…油路、２５ａ…開口端。 Figures 1 to 4 show an embodiment of the present invention, where Figure 1 is a sectional side view, Figure 2 is a front view, Figure 3 is a sectional view taken along the - line in Figure 2, and Figure 4 is a power steering wheel. A sectional view of a relief valve provided in the device, FIG. 5 is a cross-sectional view showing a modification of the present invention, FIG. 6 is a graph showing pressure override of the present invention and the prior art, and FIG. 7 is a diagram of the present invention and the prior art. Fig. 8 is a front view showing the prior art;
, 10 shows an example of a hydraulic circuit in a power steering device, and FIG. 9 is a cross-sectional view,
FIG. 10 is a front view. 10...Relief valve, 11...Poppet, 12...Valve seat, 13...Spring, 18...Flange part, 19
...Piston part, 27...Enlarged opening, 27a...Edge, 23...Circuit pressure oil inlet side end, 24...Outer peripheral surface, 2
5... Oil path, 25a... Open end.

Claims

[Scope of utility model registration request]

It has a flange portion 18 that comes into contact with the valve seat 12 and a piston portion 19 that protrudes from the flange portion 18. In the poppet of a direct acting relief valve in which an oil passage 25 with a circular cross section extending halfway is formed,
An enlarged opening 27 communicating with the oil passage 25 is formed in the outer circumferential surface 24 of the piston portion 19, and an edge 27a on the preceding opening side of the enlarged opening 27 is formed approximately parallel to the valve seat 12. A poppet of a direct-acting relief valve that is characterized by: