JPH034944U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案一実施例の減衰力可変型液圧緩
衝器の要部を示す断面図、第２図は実施例の第１
ピストン及び第２ピストンの上面を示す平面図、
第３図は第１ピストンの下面を示す底面図、第４
図は第２ピストンの下面を示す底面図、第５図は
実施例の液圧回路図、第６図は実施例のベースを
示す断面図、第７図は第６図Ｅ部の拡大断面図、
第８図は実施例の伸行程時のピストン速度に対す
る減衰力特性図、第９図は実施例の圧行程におけ
るピストン速度に対する減衰力特性図である。 Ａ……上部液室（第１液室）、Ｂ……下部液室
（第２液室）、Ｃ……中間室、Ｆ……バイパス路
、１……シリンダ、３……ピストンロツド、７…
…第１ピストン、７ｅ……第１伸側連通孔（第１
連通孔）、８ａ……第１伸側デイスクバルブ、８
ｂ……第２伸側デイスクバルブ、９……第２ピス
トン、９ｄ……第２内側開口窓、９ｅ……第２外
側開口窓、９ｆ……第２伸側内側シート面、９ｇ
……第２伸側外側シート面、９ｈ……第２伸側連
通孔（第２連通孔）、１５……調整子（可変オリ
フイス）、１５ｂ……第１オリフイス孔、１５ｃ
……第２オリフイス孔、１５ｄ……第３オリフイ
ス孔。 FIG. 1 is a sectional view showing the main parts of a variable damping force type hydraulic shock absorber according to an embodiment of the present invention, and FIG.
A plan view showing the top surfaces of the piston and the second piston,
Figure 3 is a bottom view showing the lower surface of the first piston;
The figure is a bottom view showing the lower surface of the second piston, Figure 5 is a hydraulic circuit diagram of the embodiment, Figure 6 is a sectional view showing the base of the embodiment, and Figure 7 is an enlarged sectional view of section E in Figure 6. ,
FIG. 8 is a characteristic diagram of damping force versus piston speed during the extension stroke of the embodiment, and FIG. 9 is a characteristic diagram of damping force versus piston speed during the compression stroke of the embodiment. A... Upper liquid chamber (first liquid chamber), B... Lower liquid chamber (second liquid chamber), C... Intermediate chamber, F... Bypass path, 1... Cylinder, 3... Piston rod, 7...
...First piston, 7e...First extension side communication hole (first
communication hole), 8a...first expansion side disc valve, 8
b...Second extension side disc valve, 9...Second piston, 9d...Second inner opening window, 9e...Second outer opening window, 9f...Second extension side inner seat surface, 9g
...Second extension side outer sheet surface, 9h...Second extension side communication hole (second communication hole), 15...Adjustor (variable orifice), 15b...First orifice hole, 15c
...Second orifice hole, 15d...Third orifice hole.

Claims (1)

【実用新案登録請求の範囲】 シリンダ内を第１液室と第２液室とに画成して
直列に設けられ、かつ、相互間に中空室が形成さ
れた第１ピストン及び第２ピストンと、 一方の液室と中間室とを連通して第１ピストン
に形成された第１連通孔及び、他方の液室と中間
室とを連通して第２ピストンに形成された第２連
通孔と、 前記第１連通孔を開閉すべく第１ピストンに設
けられた第１デイスクバルブ及び、第２連通孔を
開閉すべく、内外２重のシート面に当接して第２
ピストンに設けられた第２デイスクバルブと、 両連通孔と並列に、一方の液室と中間室とを連
通すると共に、一方の液室と両シート面の内側に
形成された開口窓の一方とを連通して形成された
バイパス路と、 該バイパス路に設けられた可変オリフイスと、 を備えていることを特徴とする減衰力可変型液
圧緩衝器。[Claims for Utility Model Registration] A first piston and a second piston are provided in series with the inside of the cylinder divided into a first liquid chamber and a second liquid chamber, and a hollow chamber is formed between them. , a first communication hole formed in the first piston to communicate one liquid chamber and the intermediate chamber, and a second communication hole formed in the second piston to communicate the other liquid chamber and the intermediate chamber. , a first disc valve provided on the first piston to open and close the first communication hole; and a second disc valve that abuts against the inner and outer double seat surfaces to open and close the second communication hole.
A second disc valve provided on the piston communicates one liquid chamber with the intermediate chamber in parallel with both communication holes, and connects one liquid chamber with one of the opening windows formed on the inside of both seat surfaces. A variable damping force type hydraulic shock absorber, comprising: a bypass path formed by communicating the two; and a variable orifice provided in the bypass path.