JPS5879152U

JPS5879152U - gas-filled hydraulic shock absorber

Info

Publication number: JPS5879152U
Application number: JP17587381U
Authority: JP
Inventors: 堤　繁樹; 堀山　修; 水向　建
Original assignee: カヤバ工業株式会社
Priority date: 1981-11-25
Filing date: 1981-11-25
Publication date: 1983-05-28
Also published as: JPS6246917Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

図面は本考案ガス入り油圧緩衝器の一実施例を示すもの
で、第１図は従来の複筒式ショックアブソーバの減衰力
特性を示すグラフ、第２図は同連続加振時の減衰力特性
を示すグラフ、第３図は本考案ショックアブソーバの正
断面図、第４図はベースバルブ部要部拡大断面図、第５
図は第４図における圧力分布を示す説明図、第６図は回
部のリーフバルブの撓み量と圧力の関係を示すグラフ、
第７図はリーフバルブにおける圧側減衰力と背圧の関係
を示すグラフ、第８図は減衰力と反発力の相互関係を示
すグラフ、第９図は従来品と本考案ショックアブソーバ
の減衰力特性を示すグラフ、第１０図は本考案の他の実
施例の減衰力特性を示すグラフである。１〜アウタチユーブ、２〜シリンダ、３〜ベアリング、
４〜ベ一スバルブ機構、５〜バルブ基板、７〜ピストン
、８〜ピストンロンド、９〜シ一ル部Ｌ１０〜チャック
シール、１１〜連通孔、１３〜リーフバルブ、１４．１
８〜チエツク弁、１７〜オリフイス、１９〜伸側逆止弁
、２０〜ピストンバルブ。The drawings show an example of the gas-filled hydraulic shock absorber of the present invention. Figure 1 is a graph showing the damping force characteristics of a conventional dual-tube shock absorber, and Figure 2 is a graph showing the damping force characteristics during continuous vibration. FIG. 3 is a front sectional view of the shock absorber of the present invention, FIG. 4 is an enlarged sectional view of the main part of the base valve, and FIG.
The figure is an explanatory diagram showing the pressure distribution in Fig. 4, and Fig. 6 is a graph showing the relationship between the amount of deflection of the leaf valve of the turning section and the pressure.
Figure 7 is a graph showing the relationship between compression damping force and back pressure in a leaf valve, Figure 8 is a graph showing the correlation between damping force and repulsion force, and Figure 9 is the damping force characteristics of the conventional shock absorber and the shock absorber of the present invention. FIG. 10 is a graph showing damping force characteristics of another embodiment of the present invention. 1~Outer tube, 2~Cylinder, 3~Bearing,
4-Base valve mechanism, 5-Valve board, 7-Piston, 8-Piston rond, 9-Seal portion L10-Chuck seal, 11-Communication hole, 13-Leaf valve, 14.1
8-check valve, 17-orifice, 19-extension side check valve, 20-piston valve.

Claims

[Scope of utility model registration request]

(1) In a dual-tube shock absorber in which a cylinder is inserted into the outer tube, the base valve interposed between the lower chamber of the inner tube and the cylindrical chambers of the outer and outer tubes is configured as a leaf valve type with a fixed inner periphery. The piston is fixed to the piston rod end inserted into the cylinder, and forms a piston knob, and the upper and lower chambers of the cylinder and the lower part of the cylindrical chamber are filled with hydraulic oil, and the upper part of the cylindrical chamber is filled with low pressure gas. It is characterized in that the pressure increase in the reservoir chamber due to the entry of the piston rond is made to act as back pressure on the leaf valve, thereby improving the damping force rise characteristics during speed increase in the compression stroke. A gas-filled hydraulic shock absorber.

(2) A request for registration of a utility model characterized in that the reservoir chamber and the upper space of the cylinder are communicated via a check seal to prevent or delay the pressure in the reservoir chamber from propagating to the back pressure of the piston. A gas-filled hydraulic shock absorber according to item 1.

(3) forming a small gap of 100μ or less between the piston rod sliding bearing provided in the cylinder communicating the reservoir chamber and the upper space of the cylinder, and the piston rod;
The gas-filled hydraulic shock absorber according to claims 1 and 2, characterized in that the pressure in the reservoir chamber is delayed from propagating to the back pressure of the piston.