JPH0312033U

JPH0312033U -

Info

Publication number: JPH0312033U
Application number: JP7034789U
Authority: JP
Priority date: 1989-06-15
Filing date: 1989-06-15
Publication date: 1991-02-07
Anticipated expiration: 2004-06-15
Also published as: JP2515440Y2

Description

[Brief explanation of drawings]

第１図は本考案第１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図は実施例のピ
ストンロツドの上面を示す平面図、第３図はピス
トンロツドの上部を示す断面図、第４図は実施例
の伸・圧両行程時のピストン速度に対応した減衰
力特性図、第５図は第２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６図はピストン
ロツドの上部を示す断面図である。Ａ……上部液室、Ｂ……下部液室、Ｂｙ１……
圧側バイパス路、Ｂｙ２……伸側バイパス路、１
……シリンダ、２……ピストン、２ｂ……圧側内
側溝、２ｃ……圧側外側溝、２ｄ……圧側内側シ
ート面、２ｅ……圧側外側シート面、２ｆ……圧
側連通孔（連通路）、２ｊ……伸側内側溝、２ｋ
……伸側外側溝、２ｍ……伸側内側シート面、２
ｎ……伸側外側シート面、２ｐ……伸側連通孔（
連通路）、７……第１圧側デイスクバルブ、８…
…第２圧側デイスクバルブ、９……第１伸側デイ
スクバルブ、１０……第２伸側デイスクバルブ、
１５……スプール。 Fig. 1 is a sectional view showing the main parts of a variable damping force type hydraulic shock absorber according to the first embodiment of the present invention, Fig. 2 is a plan view showing the top surface of the piston rod of the embodiment, and Fig. 3 is a top view of the piston rod. FIG. 4 is a damping force characteristic diagram corresponding to the piston speed during both extension and compression strokes of the embodiment, and FIG. 5 shows the main parts of the variable damping force type hydraulic shock absorber of the second embodiment. 6 is a sectional view showing the upper part of the piston rod. A... Upper liquid chamber, B... Lower liquid chamber, By1...
Compression side bypass path, By2... Growth side bypass path, 1
... cylinder, 2 ... piston, 2b ... pressure side inner groove, 2c ... pressure side outer groove, 2d ... pressure side inner seat surface, 2e ... pressure side outer seat surface, 2f ... pressure side communication hole (communication path), 2j...Inner groove on growth side, 2k
... Growth side outer groove, 2 m ... Growth side inner sheet surface, 2
n... Growth side outer sheet surface, 2p... Growth side communication hole (
communication path), 7...first pressure side disc valve, 8...
...Second pressure side disc valve, 9...First expansion side disc valve, 10...Second expansion side disc valve,
15...Spool.

Claims

[Claims for Utility Model Registration] 1. A piston provided with a cylinder filled with hydraulic fluid that defines two fluid chambers, and a communication passage formed in the piston that communicates between the two fluid chambers. , a spool that forms a restriction in the middle of this communication path and is slidably provided in the axial direction of the piston, and a driving means that applies a driving force to the spool to cause the spool to slide. Features a variable damping force hydraulic shock absorber. 2. A piston provided with a cylinder filled with hydraulic fluid divided into two liquid chambers, and a double inner and outer structure formed on at least one side of the liquid chamber of the piston, with a seat surface on the outer periphery of each piston. an inner groove and an outer groove, a disc valve provided in contact with the seat surface to open and close both grooves, a communication passage that communicates the inner groove with the other liquid chamber across the piston, and the A bypass path that communicates the inner groove and the outer groove, a spool that forms a restriction in the middle of this bypass path and is slidable in the axial direction of the piston, and a driving force applied to the spool to make the spool slide. A variable damping force hydraulic shock absorber, comprising: a drive means for providing the following;