JPH0367733U

JPH0367733U -

Info

Publication number: JPH0367733U
Application number: JP12474689U
Authority: JP
Priority date: 1989-10-25
Filing date: 1989-10-25
Publication date: 1991-07-02

Description

[Brief explanation of drawings]

第１図Ａは本考案に係るバルブ機構を備えた緩
衝器の圧縮行程におけるピストン周りの断面図、
第１図Ｂは第１図ＡのＡ−Ａ矢視図、第２図は同
バルブ機構の伸び行程におけるピストン周りの断
面図、第３図は本考案に係るバルブ機構の減衰力
特性を示すグラフ、第４図Ａ、第５図Ａ及び第６
図は別実施例を示す断面図、第４図Ｂは第４図Ａ
のＢ−Ｂ矢視図、第５図Ｂは第５図ＡのＣ−Ｃ矢
視図である。尚、図面中２はピストンロツド、３はピストン
、６は圧縮側油路、７は伸び側油路、８は圧縮側
バルブ、９は伸び側バルブ、１１はサブ油路、１
２はセパレータ、１３，２０，２２はコンスタン
トオリフイスである。 FIG. 1A is a cross-sectional view around the piston during the compression stroke of a shock absorber equipped with a valve mechanism according to the present invention;
Fig. 1B is a view taken along the line A-A in Fig. 1A, Fig. 2 is a sectional view around the piston during the extension stroke of the same valve mechanism, and Fig. 3 shows the damping force characteristics of the valve mechanism according to the present invention. Graphs, Figures 4A, 5A and 6
The figure is a sectional view showing another embodiment, and Figure 4B is Figure 4A.
FIG. 5B is a view taken along the line C-C in FIG. 5A. In addition, in the drawing, 2 is the piston rod, 3 is the piston, 6 is the compression side oil passage, 7 is the extension side oil passage, 8 is the compression side valve, 9 is the extension side valve, 11 is the sub oil passage, 1
2 is a separator, and 13, 20, 22 are constant orifices.

Claims

[Claims for Utility Model Registration] (1) A compression side oil passage and an extension side oil passage are formed in the piston, and a compression side valve that opens and closes the compression side oil passage and a compression side oil passage that opens and closes the compression side oil passage are provided on both sides of the piston. In the valve mechanism of the shock absorber provided with the expansion side valve, a sub oil passage bypassing the valve is provided in parallel with the oil passage, a sub valve that opens at an extremely low speed is provided at one end of the sub oil passage, and further the sub oil passage A shock absorber valve mechanism characterized by having a constant orifice located upstream of the sub-valve in the middle. (2) The constant orifice is formed in a separator constituting a sub-valve, a stopper seat provided on the end face of the piston opposite to the sub-valve, or a slit valve superimposed on these separators or the sub-valve. buffer valve mechanism. (3) The shock absorber valve mechanism according to claim 1, wherein the sub-oil passage is a groove formed along the axial direction on the surface of the piston rod.