JPS6399046U

JPS6399046U -

Info

Publication number: JPS6399046U
Application number: JP19521286U
Authority: JP
Priority date: 1986-12-18
Filing date: 1986-12-18
Publication date: 1988-06-27

Description

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

第１図は本考案の一実施例に係る油圧緩衝器の
一部縦断正面図、第２図は第１図の油圧緩衝器の
減衰力特性を示すグラフ、第３図は本考案の他の
実施例に係る油圧緩衝器の一部縦断正面図、第４
図は第３図の油圧緩衝器の減衰力特性を示すグラ
フ、第５図及び第６図は従来の油圧緩衝器の縦断
面図とその減衰力特性を示すグラフである。１１…シリンダ、１２…ピストン、１３…ピス
トンロツド、１４，１５…油室、１６…ポート、
１８…メインバルブ、２０ａ，２０，２０ｂ，２
０ｃ…バイパス、２５…サブバルブ。 Fig. 1 is a partially vertical front view of a hydraulic shock absorber according to an embodiment of the present invention, Fig. 2 is a graph showing damping force characteristics of the hydraulic shock absorber of Fig. 1, and Fig. 3 is a graph showing damping force characteristics of the hydraulic shock absorber according to another embodiment of the present invention. Partial longitudinal sectional front view of the hydraulic shock absorber according to the example, No. 4
This figure is a graph showing the damping force characteristics of the hydraulic shock absorber shown in FIG. 3, and FIGS. 5 and 6 are longitudinal sectional views of the conventional hydraulic shock absorber and graphs showing the damping force characteristics thereof. 11... Cylinder, 12... Piston, 13... Piston rod, 14, 15... Oil chamber, 16... Port,
18... Main valve, 20a, 20, 20b, 2
0c...Bypass, 25...Sub valve.

Claims

【実用新案登録請求の範囲】 (1) シリンダ内にピストンを介してピストンロ
ツドが移動自在に挿入され、ピストンはシリンダ
内に上下二つの油室を区画し、ピストンには二つ
の油室を連通するポートを設け、このポートの下
部口端にメインバルブを開閉自在に設けた油圧緩
衝器に於て、前記二つの油室を連通するバイパス
を設け、このバイパスの下流側端部にサブバルブ
を開閉自在に設けた油圧緩衝器の減衰力発生装置
。 (2) バイパスがピストンロツドに形成され、バ
イパスの下流側端部に伸側サブバルブが開閉自在
に設けられている実用新案登録請求の範囲第１項
記載の油圧緩衝器の減衰力発生装置。 (3) バイパスの途中にバイパスの通路面積を調
節するロータリバルブが回転自在に挿入され、ロ
ータリバルブは外部から回転操作される実用新案
登録請求の範囲第１項記載の油圧緩衝器の減衰力
発生装置。 (4) ピストンロツドの下部外周にバルブシート
が保持され、このバルブシートにバイパスと連通
する通路を形成し、この通路の口端に伸側サブバ
ルブが開閉自在に設けられている実用新案登録請
求の範囲第１項記載の油圧緩衝器の減衰力発生装
置。[Claims for Utility Model Registration] (1) A piston rod is movably inserted into the cylinder via a piston, the piston defines two upper and lower oil chambers in the cylinder, and the two oil chambers communicate with the piston. In a hydraulic shock absorber, a port is provided, and a main valve is provided at the lower mouth end of the port so that the main valve can be opened and closed, and a bypass is provided that communicates the two oil chambers, and a sub-valve is installed at the downstream end of this bypass so that the main valve can be opened and closed. A damping force generating device for a hydraulic shock absorber installed in (2) The damping force generating device for a hydraulic shock absorber according to claim 1, wherein the bypass is formed in the piston rod, and the extension sub-valve is provided at the downstream end of the bypass so as to be openable and closable. (3) A rotary valve for adjusting the passage area of the bypass is rotatably inserted in the middle of the bypass, and the rotary valve is rotatably operated from the outside to generate a damping force of the hydraulic shock absorber according to claim 1 of the utility model registration claim. Device. (4) A utility model registration claim in which a valve seat is held on the outer periphery of the lower part of the piston rod, a passage communicating with a bypass is formed in this valve seat, and an extension side sub-valve is provided at the mouth end of this passage so as to be openable and closable. 2. A damping force generating device for a hydraulic shock absorber according to item 1.